2021 Long Range Weather Forecast for San Francisco, CA

Get the Long Range Weather for Your Location

See long range weather forecasts for the next 60 days from The Old Farmer’s Almanac! Our long range forecasts can be used to make more informed decisions about future plans that depend on the weather, from vacations and weddings to sporting events and outdoor activities.

To see long term forecasts for the entire year, pick up a copy of The 2021 Old Farmer’s Almanac, available online and in stores.

Note: Long range forecasts are regional, not city-specific.

Free 2-Month Weather Forecast

January 2021 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Jan 1-6Rain, then sunny, cool
Jan 7-15Sunny, turning warm
Jan 16-20Sunny, cool
Jan 21-26Sunny, warm
Jan 27-31Rainy, cold
Januarytemperature 55.5° (avg. north, 3° above south)
precipitation 2" (1" below avg.)

February 2021 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Feb 1-12Rainy periods, cool
Feb 13-21Sunny, cool
Feb 22-25Rain, some heavy; cold
Feb 26-28Sunny, cool
Februarytemperature 53° (2° below avg.)
precipitation 2.5" (1" below avg. north, 2" above south)

Annual Weather Summary
November 2020 to October 2021

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. April and May will be cooler than normal, with rainfall below normal in the north and above normal in the south. Summer temperatures will be cooler than normal inland and warmer near the coast, with slightly above-normal rainfall. The hottest periods will be in mid-June and mid- to late August. September and October will be warmer and rainier than normal.

Map showing Old Farmer's Almanac long range weather region number 16

About the Pacific Southwest Region

The Pacific Southwest long range weather region includes all or part of the following states: CALIFORNIA (Long Beach, Los Angeles, San Diego, San Francisco, San Jose).

Pacific Southwest Neighboring Regions

Here are the regions that neighbor the Pacific Southwest long range weather region:

Temperature and Precipitation November 2020 to October 2021

Temperature and Precipitation Chart, November 2020 to October 2021 for San Francisco, CA

Reader Comments

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Cell Tower Radiation

I wonder if the growing amount of cell tower radiation in urban areas causes energy patterns that keep rain away.


I am surprised on how the Farmers Almanac can continue to forecast incorrect rain forecast for Southern California. So far its been very inaccurate. I think its time to find a new resource to predict the weather or else face no one actually paying any attention to your incorrect forecast. So far you have been 100% off the mark

All in this together

Along with the rest of northern californians, I have lost so many of my favorite forests and communities that have drawn me for long camping vacations under blue skies of summer, as well as foggy ones at coastal parks. So have millions and millions of plants, birds, insects and animals...and so many of our human residents too in horrific firestorms. If we all could try just one action in the new year that we individually believe will help our situation, big or small, environmental support or lifestyle change, there is bound to be a meaningful impact over time. If only in our ownership of an individual sense of responsibility, to help remedy the destruction our civilization has incurred with our population explosion over the past 200 years.

Give me some rain...

When I moved to San Francisco in 1988, there was low fog every morning and plenty of rain in the winter. Now...all we get are a few drizzles, from December to February. For the past 4 years the forests of California, top to bottom, have been burning apocalyptically. I had been in love with the Bay Area once but now all I can think about is how much I want to live in Portland or Seattle.

Why does it get so hot in the fall and dry/mild in the winter

I'm sick and tired of the Heat in the fall and Dry and Mild in the Winter. I want California to get a Super Wet Rainy season in the Central Valley and SF Bay area. Also, I want to have The Sierra Nevada Mountains and Tahoe to have a super Snowy Season. I really want the rainy/snowy season to Start in the beginning of September and end in the middle of June Like California is Supposed too!!! I'm Sick and Tired of Dry, Mild, Smokey and Really Hot Hot Weather. Also, in the Summer Time, I want Highs to be in Lower-Mid 90s inland, Upper 70s and Lower 80s by the Bay and Upper 50s and Lower-Mid 60s at the Coast. Sometimes, I want the Marine layer to come to the coast for 2 weeks in the summer time to make California nice and cool. All I want for Summer is The Delta Breeze Inland and the Marine Layer with Fog at the coast for 2 weeks and for 1 week, it can be sunny and hot, like summer time. And that's all I want for California To have forever and ever.

THE END!!!! Hope you guys like my Comment.


I remember growing up in the 70s, it use to rain during the rainy seasons. I had a reason to wear sweaters that my grandmother made. I don't know why stores sell "winter" gear for an area, particularly Southern CA when it doesn't get cold enough. Sure if you live in the mountains, but I'm 15 mins from the beach and 73° is the best we get? I sure miss rainy days and actually having a reason to bundle up. Can't wait to leave here.

Catch up

The only "rainy period" we had in Oceanside was on the 25th of October. First rain of this month. The Almanac finally caught up today the 27th. It's sunny and definitely cool with 45 degrees.

Farmer's Almanac Forecast

The Farmer's Almanac forecast would most certainly be FAR more accurate were it not for the fact that we humans have burned so much fossil fuel that we have completely changed the atmospheric composition of our planet, therefore changing our weather patterns which used to run in somewhat more predictable cycles! We as humans have raped and misused our planet and NOW are paying the price for being poor custodians of a fragile ecosystem that has become completely out of balance, look at what the Industrial Revolution of the 1800s along with the "Technological Revolution" of current times has done for planet Earth! I only hope we are not past the ecological tipping point and we as humans can forestall the coming higher temperatures associated with global warming and climate change by changing our old energy use and production habits and avoid another ice age!


None of this is even close to being correct. It is always cooler than what is predicted or hot, much hotter than predicted. It is not worth the post to have this website. 118F in the San Fernando Valley of Los Angeles is just wildly crazy. That is Death Valley weather and no one really wants to live there.

the heat

The Editors's picture

Thanks to all of you for writing. This has been an exceptional year for you folks on the West Coast. Recognizing but not having space or time to explain how many factors–including ocean temps–affect the weather, here is an explanation from our meteorologist of how we make our forecasts averages. This does not excuse any accuracies (or inaccuracies) but is an attempt to put some of this in perspective: 

The average monthly temperature is the average of the high and the low temperatures for the month.  Keep in mind that this applies to the region as a whole, rather than a specific location.  So, for example, while the region might show an average temperature of 50, a particular location that is warmer than most spots in a region might have a normal high of 65 and a normal low of 47 (for a normal average temperature of 56).  The way I calculate the average temperature for a region is by looking at a map showing the “official normal” temperatures for locations in the region (which are averages of the past 30 years, updated every 10 years), and calculating an average for the region, eye-ball weighted by area and also population.  So, to give a simple example, if the average of all locations in a region is 48 (counting all areas equally), but the two big cities (with much of the region’s population) average 54, I might use 50 or 51 as the average for the region as a whole.