San Francisco weather January

Get the monthly weather forecast for San Francisco, CA, including daily high/low, historical averages, to help you plan ahead January is one of the coldest months in San Francisco, USA and it is also one of the wettest. This month is the rainy season and heavy downpours can occur at any time with a month's worth of rain sometimes falling over a couple of days. During this month temperatures are gradually rising with the average temperature at 10 0 C

The Weather Channel - Local Weather Forecast

• While January is one of San Francisco's cooler months, a mid-weight jacket (or a bit more) will be enough on dry days. Locals often wear gloves, a hat, and a scarf in the mornings. January Events in San Francisco These popular annual events are favorites of locals and tourists alike
• The weather in January in San Francisco is quite rainy with 8 days of rain on average throughout the month. However, temperatures always remain mild in San Francisco given that it's surrounded by water. So temperatures range between 46°F and 58°F (8°C and 14°C). However, the fog and wind do make it feel colder than that
• g in 53.2°F (11.8°C) is considered life-threatening

The average minimum temperature (usually the minimum temperature is noted during the night) in San Francisco in January is 7.0°C (44.6°F). The amount of rain in January is high with an average of 111mm (4.4in). The average maximum temperature lies around 14.0°C (57.2°F) A typical day of San Francisco weather in January is in the mid to upper 50s during the day. It cools off to around the mid-40s at night. These mild temperatures make it a great place to visit while it is cold and snowy in other parts of the US. On the days that it rains, it will be slightly cooler during the day

San Francisco, CA Monthly Weather AccuWeathe

AVERAGE JANUARY TEMPERATURES. San Francisco during January tends to be on the cool side, but quite mild when compared to most of the rest of the United States during mid-winter. Daytime highs tend to be in the mid-50s F (13-14 C) as the new year begins, warming into the upper 50s F (15 C) by month's end San Francisco weather in January. Temperature January. 10°C | 51°F. Precipitation / Rainfall January. 3.1mm | 0.1 inches. Temperature January max. 14°C | 58°F In most years, San Francisco averages a daily maximum temperature for January that's between 55 and 59 degrees Fahrenheit (13 to 15 degrees Celsius). The minimum temperature usually falls between 44 and 48 °F (6 to 9 °C) The climate of San Francisco in january is tolerable. The weather in january in San Francisco is relatively dry (with 1in of precipitation over 5 days). It should be noted an improvement from the previous month since in december it receives an average of 1in of rainfall over 5 days The average sea surface temperature in January 2021 for San Francisco was 52.2°F.The maximum and minimum values were 50.8°F and 53.6°F respectively

Video: San Francisco, USA - January Weather - Holiday Weathe

The climate in San Francisco during January can be summarized as mild and wet. January is in the winter in San Francisco and is typically the coldest month of the year. Daytime maximum temperatures average around a cool 13°C (56°F), whilst at night 7°C (44°F) is normal San Francisco Temperature Yesterday. Maximum temperature yesterday: 64 °F (at 1:56 pm) Minimum temperature yesterday: 48 °F (at 6:56 am) Average temperature yesterday: 55 °F. High & Low Weather Summary for the Past Week

Daytime temperatures usually reach 13°C in San Francisco in January, falling to 7°C at night. How sunny is it in San Francisco in January? There are normally 6 hours of bright sunshine each day in San Francisco in January - that's 60% of daylight hours. Is the sea cold around San Francisco in January The climate in San Francisco during January can be summarized as warm and very dry. January is in the winter in San Francisco and is typically the coldest month of the year. Daytime maximum temperatures average around 23°C (74°F), whilst at night 15°C (59°F) is normal Average Weather in January in San Francisco California, United States. Daily high temperatures increase by 3°F, from 56°F to 59°F, rarely falling below 51°F or exceeding 65°F.The lowest daily average high temperature is 56°F on January 2.. Daily low temperatures are around 46°F, rarely falling below 39°F or exceeding 54°F.The lowest daily average low temperature is 45°F on January 3 Although San Francisco's weather may change drastically from one day and neighborhood to the next, there are some things that remain constant. Winter is a great time for indoor events like Sketchfest —the city's premier comedy festival—and to experience some of the city's best bars and restaurants, while street festivals take over during summer months Weather & What to Wear in San Francisco in January. Are you visiting San Francisco in January? If so, you will find cool weather with some rain throughout the month. Highs this month reach into the mid-50s. It dips down into the mid-40s in the evenings. It's our coolest month and is part of our rainy season

All year weather in San Francisco San Francisco, located in Northern California is home to more than 800,000 people in the city area; making it to on of the most populated major city in the U.S. (with New York City claiming 1st place) 29.34 Hg (Jan 20, 3:56 am) Average. 51 °F. 77%. 30.03 Hg. * Reported Jan 1 12:03 am — Jan 31 11:56 pm, San Francisco. Weather by CustomWeather, © 2021. Note: Actual official high and low records may vary slightly from our data, if they occured in-between our weather recording intervals... More about our weather records San Francisco, CA Weather History star_ratehome. 61 F San Francisco International Airport Station | Report. Report Station. Thank you for reporting this station. We will review the data in question

January in San Francisco: Weather and Event Guid

• This video summarizes the San Francisco weather in January, with tips on how to dress and things to do. January is a relatively mild month for San Francisco..
• San Francisco has an average daily temperature of 10ºC during January, with average highs of 13ºC and lows of 7ºC. Occasionally there's very warm or freezing weather, with a highest recorded temperature of 26ºC, and lowest recorded temperature of 0ºC
• This report illustrates the typical weather in San Francisco, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew Point. There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in San Francisco
• The city has Mediterranean climate with mild rainy winters and warm dry summers. San-Francisco is located on the peninsula of same and surrounded with water on three sides thus weather is influenced by cold currents. Average summertime temperatures are in range between 59-75 °F (15 and 24 °C) while at winter they are between 50-59 °F (10 and 15 °C)
• Visitors to the city at this time of year will probably not need to worry about wet weather clothing unlike the rainy months of December and January. The wettest July recorded was in 1973 when 76mm fell in the month and the driest was 1977 when no rain fell throughout the whole of July
• Days of Hot Weather in San Francisco. San Francisco averages just two days a year when the temperature reaches 90 degrees Fahrenheit, and none over 100. No matter how warm the day, at night the temperature always cools to less than 70 degrees. The city's hottest days usually occur in September and October
• Be prepared with the most accurate 10-day forecast for San Francisco, CA with highs, lows, chance of precipitation from The Weather Channel and Weather.co

There is rain in the San Francisco Bay Area weather forecast for seven days thanks to a series of three storms, starting January 1, 2021, on New Year's Day. Here's when the rain will move in Winters in San Francisco tend to be cold, particularly in January and February when temperatures drop to as low as 41ºF (5ºC), with highs of 57ºF (14ºC). The Best Time to Visit We think that the best time to visit the city is in the summer (from May to September), as they are the warmest months with the least rain SAN FRANCISCO. Daily Temperature Records & Normals. Began 1875 (Updated through 11/30/2002) January|February|March|April|May|June|July| August|September|October|November|December. JANUARY In January the average monthly rainfall in San Francisco, CA is 4.43 inches with rain usually falling on 10 days. In January 1975 there was a total of 1.19 inches of rain, that fell on 11 days Record : Record : Record : Record : Normal: Normal: Normal: Season: Record : Sun: Sun: January: Max: Year: Min: Year: Hi Min: Year: Lo Max: Year: Max: Mean: Min: to.

San Francisco Weather in January - Vacation Weathe

Overnight the average temperature in January is 42.8°F and in 2011 the average overnight temperature was 1.0°F warmer at 43.8°F. Precipitation for January 2011 In January the average monthly rainfall in San Francisco, CA is 4.43 inches with rain usually falling on 10 days San Francisco (/ˌsæn fɹənˈsɪskoʊ/; Spanish for Saint Francis), officially the City and County of San Francisco, is a cultural, commercial, and financial center in Northern California.San Francisco is the 16th most populous city in the United States, and the fourth most populous in California, with 881,549 residents as of 2019. It covers an area of about 46.89 square miles (121.4 km 2. In the first 12 hours of the day, San Francisco measured about an inch of precipitation, Gass said. Radar Update (ending at 1:36 pm PST): Lightning strikes observed just offshore of the SF Peninsula The second-coldest days were in 1888, when temperatures hit 29 degrees on Jan. 14 and 15. Below-freezing temperatures are unusual in the city, and Brian Garcia, a meteorologist with the National.. San Francisco Weather in January: January is one of the rainiest and coldest months of the year in San Francisco. While the cold is nothing compared to places like Chicago or New York City in the winter, you will need a warm jacket along with an umbrella; a scarf can make a big difference when it comes to warmth, especially on a windy day

The weather will be a bit of a concern for the city, National Weather Service meteorologist Gerry Diaz said of San Francisco. City officials are preparing for the storm in other ways, too California saw a dizzying turn from a dry February to a wet start to March, but federal climate experts say the recent snow and rain won't halt the state's continuing slide into drought

San Francisco, CA - January weather forecast and climate

Baseball Info - San Francisco Giants and Oakland Athletics (updated Jan 2019) DON'T HAVE A CAR WHILE IN SF. CAR RENTALS and CAR BREAK-INS (Jan 2018) On a BIKE in SF; San Francisco Off the beaten path ( updated November 2013) Best views of the Golden Gate Bridge? (July, 2014) Where to EAT and Drink in SF Locals suggest Updated **Updated October 2018 Owing to the cold current, the sea in San Francisco is cold all year round. In addition, the water temperature remains quite stable, in fact, it ranges from 12 °C (54 °F) between January and June to 14 °C (57 °F) between August and November. Here are the average sea temperatures A clear sky and a moderate breeze Sunny and a fresh breeze Sunny and a fresh breeze Strong winds and sunny intervals Sunny and a fresh breeze Sunny and a fresh breeze Sunny intervals and a fresh.

January, the same as December, in San Francisco, California, is a moderate winter month, with average temperature ranging between min 45.9°F (7.7°C) and max 56.3°F (13.5°C). In January, the average high-temperature is practically the same as in December - a still moderate 56.3°F (13.5°C). Weather in January  Visitors to San Francisco may want to take advantage of the long hour of sunshine during the summer months, and this is also statistically the driest time of the year. The area can commonly experience foggy weather which forms over the Pacific Ocean and often drifts into the city, especially during the spring and summer months when the sea temperatures are at their coldest Weather here just isn't the same as everywhere else — it's cold in the summer and warm in the winter. So whether you're trying to figure out what to pack for San Francisco in July or March, here's our season by season break down of what to bring.The Outbreaker is the perfect bag to pack in for San Francisco.Carry on sized, you won't have to check a bag, traveling on BART will be a. Winter will be cooler and drier than normal, with below-normal mountain snows. The coldest temperatures will occur in late December, late January, and mid- to late February. The stormiest periods will be from late January into early February, mid- to late February, and late March into early April

Average weather January in San Francisco, United States of

Last Updated on January 25, 2021 by Paroma. What to wear in San Francisco is an oft asked question thanks to our unique weather pattern.Unlike our cousin in the south, i.e. Los Angeles, which epitomizes the phrase It's always sunny in California , we cool cats in NorCal have a mild, temperate weather with the fog thrown in for good measure 0.0. Past weather San Francisco. Previous column Next column. Dec 19. Normal. Average high temperature Av. high temp. 58.6 ºF. 57 ºF. Average low temperature Av. low temp San Francisco, CA Weather History star_ratehome. 51 F San Francisco International Airport Station | Report. Report Station. Thank you for reporting this station. We will review the data in question

I'm considering driving up the I-5 to Portland and down the Oregon Coast on the way back to San Francisco this winter, sometime between the 18th and 25th of Dec. I don't have much time but am hoping to start very early from Concord and make it all the way to Portland in one day. Then take 2-3 days back down the Oregon Coast San Francisco Weather Averages When you plan a trip to San Francisco, you'll need to get an idea what the typical weather is like for the month that you visit. It's especially important as there are a wide range of temperatures by month and even during the day different areas of city can vary widely in climate SAN FRANCISCO (CBS SF) — Bay Area residents on Wednesday were bracing for heavy rain and gusty winds expected to move into the area Thursday morning, according to weather models According to the National Weather Service, the coldest high-temperature day ever in San Francisco was a freezing thirty-five degrees on December 11th, 1932 San Francisco County's coldest month is January when the average temperature overnight is 46.4°F. In September, the warmest month, the average day time temperature rises to 71.3°F. Average Rainfall for San Francisco Count

San Francisco Weather in January: What to Wear in S

• temperature Highest
• The annual average precipitation at San Francisco is 9.99 Inches. Winter months tend to be wetter than summer months. The wettest month of the year is January with an average rainfall of 4.72 Inches
• January is right in the middle of winter for the Northern Hemisphere, which is the coldest season of the year and generally sees the lowest temperatures and highest chances of snowfall. No snow will be falling in San Diego in January, but this is one of the two coldest months of the year in the city, along with December
• Free Long Range Weather Forecast for San Francisco, California. Calendar overview of Months Weather Forecast
• Batten down the hatches, because San Francisco's wet and wild winter is set to continue, with the National Weather Service [NWS} predicting almost a solid week of precipitation across the Bay Area
• imum/maximum temperature, humidity variation graphs. San Francisco local time, GMT offset and weather information

San Francisco February weather guide. Check temperature, rainfall & sunshine averages & more in February 2022 in San Francisco, California - US 2021 Long Range Weather Forecast for San Francisco, CA The stormiest periods will be from late January into early February, mid- to late February, and late March into early April. April and May will be cooler than normal, with rainfall below normal in the north and above normal in the south What kind of weather does San Francisco have? In San Francisco, the summers are long, comfortable, arid, and mostly clear and the winters are short, cold, wet, and partly cloudy.Over the course of the year, the temperature typically varies from 45°F to 72°F and is rarely below 39°F or above 83°F March-May: You can beat the tourist rush by visiting San Francisco in the spring when the weather is mild and hotel prices have yet to rise. Average high temperatures in the mid-60s will certainly. San Francisco Weather . No matter what time of year you visit San Francisco, you're going to need a jacket. One of our readers confirms that San Francisco is rarely warm in the summer except for an occasional heat wave. September is typically way warmer than other summer months

Find the most current and reliable 7 day weather forecasts, storm alerts, reports and information for [city] with The Weather Network San Francisco officiellt City and County of San Francisco är en stad i norra Kalifornien i USA.Staden ligger på änden av en halvö mellan Stilla havet och San Franciscobukten.Det egentliga San Francisco har omkring en miljon invånare, men staden fungerar som nav för området runt bukten (vilket även innefattar städer som San Jose och Oakland) och i området bor det cirka 8,4 miljoner. January is the wettest month in San Francisco with 4.8 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 57% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 24.6 inches in San Francisco means that it is wetter than most places in California

What is the San Francisco Weather Like in January? Free

1. San Francisco December weather guide. Check temperature, rainfall & sunshine averages & more in December 2021 in San Francisco, California - US
2. With consistently good weather across the whole of July, San Francisco is usually very dry at this time of year, and although there's sometimes fog across the Golden Gate Bridge, days are normally bright, clear and sunny. Averages. In July, the average temperature in San Francisco reaches highs of 22°C and lows of 13°C
3. What is the weather usually like in San Francisco? In San Francisco , the summers are long, comfortable, arid, and mostly clear and the winters are short, cold, wet, and partly cloudy. Over the course of the year, the temperature typically varies from 45°F to 72°F and is rarely below 39°F or above 83°F
4. SAN FRANCISCO (KGO) -- Recent winter storms in the San Francisco Bay Area didn't wash away California's drought, but the rain did help, according to ABC7 News Meteorologist Mike Nicco

Weather San Francisco in January 2022: Temperature

• Weather Forecast San Francisco - United States (California) ☼ Longitude : -122.42 Latitude : 37.78 Altitude : 30m ☀ Avec une superficie de 9,4 millions km carrés et 302 millions d'américains les Etats-Unis sont le 4ème pays le plus vaste du monde et le 3ème pay
• In May, San Francisco weather stays relatively mild and cool with low humidity. Nearing the beginning of Summer, temperatures reach low to mid-60s. Be aware that this is the time of year when the famous San Francisco fog starts to roll in, causing it to still be pretty misty
• Weather will be a bit of a concern for the city, National Weather Service meteorologist Gerry Diaz says By Bay City News • Published January 26, 2021 • Updated on January 26, 2021 at 11:57 a
• High winds knocked down branches of trees on Clay and Steiner streets on top of cars in San Francisco on Jan. 19, 2020. Instagram / allmyheartin.sf Show More Show Les

San Francisco CA Weather in January - Current Result

1. g the hottest Jan. 18 since 1920. Temperatures in Oakland also broke records Monday, reaching 76 degrees
2. The wettest month by average rainfall in San Francisco, CA is January with an average of 4.4 inches of rain falling on 10 to 11 days.Although in March it typically rains on more days with 3.6 inches falling in 10 to 11 days. The driest month in San Francisco, CA is July with an average of 0.1 inches of rain falling on 2 to 3 days
3. Wet weather is expected Thurs (January 16) with the heaviest rain to occur between 7-10am. The rain could cause transit & commuting delays as well as localized flooding in low-lying areas of the City

Weather in San Francisco in january 2022 - Temperature and

1. San Francisco har ett subtropiskt medelhavsklimat med svala till något varma, torra somrar och milda, nederbördsrika vintrar. Temperaturskillnaderna mellan årstiderna är ganska små. Sommartemperaturerna dagtid är omkring 22 °C och motsvarande 11-13° under natten, dock kan temperaturerna ibland stiga till över 30 °C
2. Because the weather in San Francisco is so changeable, the best solution is to dress in layers. A jacket or sweatshirt with a hood is the best outer layer; the wind can be cold and strong when the fog starts to come in. But an hour later, the fog may burn off and it's getting warm,.
3. Fall marks a sweet spot for San Francisco tourism. Believe it or not, the weather is often warmer now than it is in the summer. Average temperatures rest in the low 70s, and consistently sunny.
4. Weather Forecast Legend. WeatherTAB helps you plan activities on days with the least risk of rain. Low risk of rain/snow. Transition Day - Start or End of a Risky Period. Medium risk of rain/snow. High risk of rain/snow. %. Forecast risk of rain/snow. Our forecasts are not direct predictions of rain/snow

Locally, Nicco says, the Santa Cruz Mountains received the biggest benefit after receiving the most rain in January. As a result the Santa Cruz Mountains now fall in the dry category, while. Between Jan. 1 and Jan. 24, San Francisco hit 9.42 inches of rain. The last time S.F. saw a comparably wet January was 1998 when El Niño-fueled storms dumped 9.98 inches in January A lot of rain (rainy season) falls in the months: January, February and December. San Francisco has dry periods in May, June, July, August and September. On average, December is the wettest month. On average, July is the driest month

San Francisco Weather in January / Sea Water Temperature

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 52°F 52°F 53°F 53°F 54°F 54°F 55°F 55°F 56°F 56°F 57°F 57°F 58°F 58°F Now Now San Francisco San Francisco The daily average wide-area surface water temperature Short Term Forecast. This Afternoon 12pm - 6pm. 14°C. 57°F. Sunny in the afternoon. Sunny in the afternoon. Tonight 6pm - 6am. 10°C San Francisco, CA Weather History star_ratehome. 54 F San Francisco International Airport Station | Report. Report Station. Thank you for reporting this station. We will review the data in question While it's raining and dreary in San Francisco, the So Cal skies are blue, the air is clean, and it's the best time to hike and be outside. It rained on the January 1st Pasadena Rose Bowl Parade only twice in sixty years -- once in 1955 and in 2006. I like February and March better in San Francisco Weather in San Francisco. December being the wettest and January the coldest months. We do recommend carrying a light jacket at all times, regardless of when you travel. It does get chilly (cold) in the evenings and night. Take a pack-able jacket with you

south san francisco past weather data including previous temperature, barometric pressure, humidity, dew point, rain total, and wind conditions Sunrise and sunset times, civil twilight start and end times as well as solar noon, and day length for every day of January 2019 in San Francisco, California. In San Francisco, California, the first day of January is 09 hours, 37 minutes long. The last day of the month is 10 hours, 19 minutes, so the length of the days gets 42 minutes longer in January 2019 People walk along Pier 14 with the Bay Bridge in the background in San Francisco, California during a steady rainfall. The first significant rainstorm of the season hit the San Francisco Bay Area.

San Francisco Weather in January 2021 United States

San Francisco County's coldest month is January when the average temperature overnight is 46.4°F. In September, the warmest month, the average day time temperature rises to 71.3°F. Is San Francisco weather good? The good news: San Francisco has a very mild climate. It rarely gets out of the 55 to 65 degree range (12 to 18°C), summer or winter Fog is a common weather phenomenon in the San Francisco Bay Area as well as along the entire coastline of California extending south to the northwest coast of the Baja California Peninsula.The frequency of fog and low-lying stratus clouds is due to a combination of factors particular to the region that are especially prevalent in the summer Answer 1 of 10: My husband and I are planning our first trip to SF and combining it with a trip up to Napa. We are thinking about spending two nights in SF and then heading up to Napa, we could spend three in SF if there is enough to fill our time. Does two.. AVERAGE TEMPERATURES IN APRIL. April is a great time to explore San Francisco! We've finally reached the end of the wet season, and we can expect to see a lot more sun. The average high temperature will be around 63 F (17 C). On a few of the warmer afternoons, you may expect temperatures to reach at least 75 F (24 C) Average temperature low and high: 51° - 64°. In May, San Francisco weather stays relatively mild and cool with low humidity. Nearing the beginning of Summer, temperatures reach low to mid-60s. Be aware that this is the time of year when the famous San Francisco fog starts to roll in, causing it to still be pretty misty

Past Weather in San Francisco, California, USA — Yesterday

Get the historical monthly weather forecast for San Francisco, CA, US We use cookies on this site to improve your experience as explained in our Cookie Policy. You can reject cookies by changing. 7-hour rain and snow forecast for San Francisco, CA with 24-hour rain accumulation, radar and satellite maps of precipitation by Weather Underground

San Francisco weather in January 2022, California, US

San Francisco Weather averages for holidays in 2021/2022. Check average temperature, sunshine & rainfall plus more in San Francisco, California. January is usually the wettest month in San Francisco with 125mm on average. There are normally 10 days in January with some rain San Francisco Ballet. The San Francisco Ballet's season runs from January to May each year. They offer several performances each month including classics such as Cinderella, Frankenstein, and others. All of their performances are at the War Memorial Opera House across the street from City Hall in the Civic Center district

San Francisco Weather in January 2021 Costa Rica

San Francisco, CA - Weather forecast from Theweather.com. Weather conditions with updates on temperature, humidity, wind speed, snow, pressure, etc. for San Francisco. In San Francisco, there are 0 comfortable months with high temperatures in the range of 70-85°. September is the hottest month for San Francisco with an average high temperature of 69.9°, which ranks it as one of the coolest places in California. Any measurable snowfall is a rare occurance in San Francisco San Francisco can be breezy at times with the wind during March coming mostly from the west or northwest at 9-12 mph (15-20 kph) with gusts generally 18-21 mph (up to 32 kph). WHAT TO WEAR IN MARCH The weather tends to be cool so a couple of sweaters with long sleeve shirts (no shorts) and at least 1 medium weight jacket or coat will be needed

Average Weather in January in San Francisco, California

In the span of 141 years of climate records, there has never been a warmer January than last month, the National Oceanic and Atmospheric Administration (NOAA) announced Thursday Weather for the week in San Francisco, United States of America. Looking at the weather in San Francisco, United States of America over the week, the maximum temperature will be 23℃ (or 73℉) on Sunday 18 th April at around 2 pm. In the same week the minimum temperature will be 8℃ or 46℉ on Thursday 15 th April at around 11 pm.. Looking at the world weather radar, national weather. SAN FRANCISCO INTL AP, CA SAN MATEO County, Coop ID: 47769 Elevation: 8 ft. Latitude: 37° 39' N Longitude: 122° 26' W : NOAA Online Weather Dat

KSFO/SFO Weather for San Francisco Intl Airport - (San Francisco, CA The National Weather Service Forecast office for the San Francisco Bay Area (located in Monterey) is responsible for issuing forecasts and warnings for the coastal waters outside the Golden Gate (out to 60 nautical miles offshore), and also for San Francisco Bay, San Pablo Bay, Suisun Bay and the west Delta The climate in San Francisco during February can be summarized as mild and a little damp. February is in the winter in San Francisco and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cool 16°C (60°F), whilst at night 8°C (47°F) is normal San Francisco, United States January average sea temperature. Marine / ocean climate data updated daily, surface sea temperatures and recorded in degrees centigrade and farenheit The climate in San Francisco during December can be summarized as hot, humid and dry. December is in the winter in San Francisco and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a steamy 31°C (88°F), whilst at night 21°C (70°F) is normal