2020 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

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.)

October 2020 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Oct 1-4Rainy periods, cool
Oct 5-12Sunny, turning warm
Oct 13-17Showers, then sunny, cool
Oct 18-23Rainy periods, cool
Oct 24-31Sunny, cool
Octobertemperature 63° (2° below avg.)
precipitation 0.8" (1" above avg. north, 0.5" below south)

Annual Weather Summary
November 2019 to October 2020

Winter will be cooler than normal. Rainfall will be below normal in the north and above normal in the south, with below-normal mountain snows. The coolest temperatures will occur in mid- and late December, mid- to late January, early to mid-February, and early and late March. The stormiest periods will be in late November, mid- to late December, and early February; from late February into early March; and in mid- and late March. April and May will be cooler than normal, on average, with rainfall below normal in the north and above normal in the south. Summer will be cooler than normal, with rainfall slightly above normal. The hottest periods will be in mid-July and late August. September and October will be slightly cooler than normal, on average, with rainfall above normal in the north and below normal in the south.

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 2019 to October 2020

Temperature and Precipitation Chart, November 2019 to October 2020 for San Diego, CA

Reader Comments

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Farmers Almanac was WAY OFF down here for the Summer 2020 cast

You're better off following National Weather Force or Southern California Weather Force on Facebook than this. I mean Southern California Weather Force had a hellish summer for the forecast and dry for Southern California, which it was. Farmers Almanac had COLD??

Heat came early.So what!

The heat came early. Better hope rain comes early as well. The entire west coast needs rain asap.

Inaccuracies are OK

People leaving angry comments obviously don’t understand an almanac is for “predictions.” If the weathers different, change your clothes don’t cry on the internet about it.


No longer so easy to forecast, is it? This prediction is way off. Last week the SF bay area and northern CA had record breaking heat.

wow wrong

completely wrong .. sept 1 was so hot .. these predictions are completely wrong.


Boy , did you guys get this wrong. It was 102 in Cypress, Ca and that's hot for a city located about 5 miles from the beach. Do not know what your using to guess the weather but whatever it is ..its not working.

If you’re in Temecula here’s the reason it may not snow

So if it’s not snowing in your area the reasoning is 1. It is a hot place 2. It’s not cold enough 3. It needs to rain but if it’s at 100° it will not rain. That’s the reasoning don’t be mad because of that if the weather lies it doesn’t mean you can say Ugh Here’s what you should do if you really want it to snow 1. Go to a cold city or The mountains 2. Wait until December The weather can change 3. Fix your issues and just have fun with your day. That’s how If you say I’m lying I’m just giving you an example Bye.

In my city it might snow, But

In my city it might snow, But if it’s true I’m going to freak outs And play in the snow but if you are all in a different country like Los Angeles or New Mexico That’s all right I hope you all get snow to And if you get snow I wish you the best of luck And don’t be mad if it doesn’t snow I want to make your day happy an unique and flexible so yeah. Farmers Is a great Website And it tells the truth on whether it will be snowing Or diff kinds but I hope you enjoy the snow when it comes byee.

yay its gonna snow

yay its gonna snow


Change is just that, change. Climate change doesn’t mean hotter. It means more extreme. Extremes are not good for flora and fauna that have co-evolved with a “normal” climate. What we experience today is not normal, thus why we are seeing the greatest mass extinction in the history of our planet. I realize most of you are not scientists, that said you should listen to the people who are. Science does get public funding, but I can attest that no scientist gets rich on gi ring the most grime news. Science has no agenda except fact. Take it for what it is. You would not tell your doctor he is wrong about your cancer diagnosis, you’d ask for another opinion. Just realize you have to ask another qualified person. Science is credible wether you understand it or not. In closing, your belief is irrelevant to fact. Just because your beliefs are compromised by fact does not change fact....