2020-2021 Long Range Weather Forecast for San Diego, 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

August 2020 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Aug 1-8Sunny, seasonable
Aug 9-11Scattered showers north, sunny south; cool
Aug 12-16Sunny, warm
Aug 17-25Sunny inland; am clouds, pm sun coast; cool
Aug 26-31Sunny, warm
Augusttemperature 69° (2° below avg.)
precipitation 0.2" (0.2" above avg. north, avg. south)

September 2020 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Sep 1-3Showers, cool
Sep 4-8Sunny inland; am sprinkles, pm sun coast; cool
Sep 9-15Sunny; hot inland, cool coast
Sep 16-18Sunny, hot
Sep 19-27Sunny, warm
Sep 28-30Showers, cool
Septembertemperature 71° (1° above avg.)
precipitation 0.2" (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 San Diego, CA

Reader Comments

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RAIN

Okay. I am a big wet weather fan. I heard this on a weather forum several years back. Pls don’t laugh
After that huge earthquake in Japan. I heard it was so powerful it actually tilted the earths Axis 1-3 percent. If so would that have shifted the weather? So San Francisco would actually be LA type weather? Please don’t laugh

Tilting of the earth

Yes the big quake in Japan did in fact alter weather patterns. When the. Island moved it altered the ocean currents. Add to that the big quake in the south Pacific and currents were definitely altered. Warm water currents moved a bit north that has resulted in our weather patterns shifting north. San Francisco will begin to see San Diego type weather. San Diego will experience southern Baja Californina type weather. The conditions that create El Ninio and La Nina have been altered . look for a "NEW" norm that most of us will not like. Extended droughts, water restrictions will become a way of life.

Snow

Hi Mike,
Thank you for this great information. May I ask, what would be a good holiday vacation with snow fun for the family in the states, considering “this weather we are having now is the new normal”? Planned to spend at Yosemite National Park by looks like there is going to be no snow as of week of Christmas.

Rain in the forecast

Mike would love to know if you see any rain at all coming our way and would love to stay in touch

Your forecast

so much for forecasting the weather. its pouring in the bay area and has been for the last week.

Your prediction

Hi Mike,
I’m a Beekeeper in the CA Central Valley/mid coast area. Given your background in meteorology I’d love to get your rainfall prediction for the entire 2019 year. Would you say it’s going to be above/below normal?
Thanks!

Grant money

Scientists who will write anything you want in a report for grant money

San Diego? D

Why do they even bother selling boots coats and umbrellas here??! I hate this. Has anyone heard that we could get ANY interesting weather aside from our day in day out sunshine down here? We used to in the 90’s!

Rain South Sacramento

Will South Sacramento get any rain in the 2018 winter season? Also, will the temperatures ever decrease? It is still in the mid-eighties here.

Prospects for November rain on Catalina Island

What are the chances for a wet November for Catalina Island?

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