2020-2021 Long Range Weather Forecast for Pacific Southwest

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

December 2020 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Dec 1-6Rainy periods, cool
Dec 7-12Sunny, cool
Dec 13-16Showers, cool
Dec 17-22Sunny, warm
Dec 23-31Sunny, cold
Decembertemperature 52° (2° below avg.)
precipitation 0.5" (1.5" below avg.)

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.)

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 Pacific Southwest Region

Reader Comments

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***COOLER TEMPS*** not cooker

***COOLER TEMPS*** not cooker. Ugh


No one from California calls it Cali.


Us Californians are dying of all this heat, is any rain or cold coming soon?? I work for a doctor skincare and I am seeing more and more patients walk in with skin cancer, this is becoming a major issue, I'd advise to everyone who lives in California to not go outside until there is no more heat.

Nor-Cal vs.So.Cal

I agree with most that living in N.california(Chico/Red Bluff) our weather is very different from S.California.It would be nice to get separate zone forecasts.

I agree. It needs to be

I agree. It needs to be updated for SoCal

Farmers Almanac Zones

I may be mistaken, but this zone SW has nothing to do with modern weather predictions.The Farmers Almanac has been predicting or fore casting based on the moon cycles for 100 years + or - My Grandfather born in 1907 died in 1993 followed this for planting schedules. I have continued to read it just because! I also measure the rain & temperatures as he did, just because.
I have found this to be fairly accurate.

Stop Whining!

They say that weather predictions beyond 10 days out are correct only 50% of the time. So, stop whining that SoCal is different than Nor
Cal. Beyond 10 days out, it's only for entertainment's sake. If you want an accurate 10-day forecast, go to NOAA.gov . . . and stop whining!

please stopping lumping So Cal with No Cal's weather!

Every year you guys lump So Cal, central coast and No Cal together in your predictions and it makes for very inaccurate forecasts. The Calif coast is hundreds of miles long and has very different topography and climates from north to south and west to east thus giving us everything from blazing hot and dry, to heavy snow to rainy and windy or foggy and all on the same day. Thank you!

Central California

There should be another region. Central California ( Santa BarbaraSan Luis Obispo County) has a whole different climate.

San Luis Obispo County

I agree, we need specfic forecast for San Luis Obisp County, in California. We have coastal areas and inland, very different climates.