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

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.)

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 Pacific Southwest Region

Reader Comments

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your chart "TEMPERATURE AND PRECIPITATION NOVEMBER 2019 TO OCTOBER 2020" is difficult to interpret. please put in better instructions

Stop Global Whining

You have choices.Take control of your life and choose to be happy.

Why Do Stores Even Sell Jackets?

I guess for those who travel elsewhere! Because we certainly don’t need any winter attire here. It’s going to be 81 degrees on Monday in San Diego. Who can think of cooking a Thanksgiving turkey in an oven with this weather? It just puts a damper on all the holidays when it stays warm and sunny through fall and “winter.” Yuck!

Jeff. you need to move. The

Jeff. you need to move. The big body of water that surrounds SF, provides you with the weather you apparently DON'T like. Move to the mountains of the west and you can get the weather you want. Do you know how many would die if there was a blizzard in SF? What it would do to the city and you? Be careful what you wish for. I just hope I don't get 9 inches of rain in the high desert in 30 hours again this year. But it isn't the record either.

Fed Up With Interminable Summer!

I agree with many of the comments here. I rarely post about things like this, and I understand there's nothing we Californians can do about it, but I am so unbelievably FED UP with these sickening temperature swings in San Francisco (and in California in general). Just when you think it's over after a day or two of 62 degrees, the next day is 71, then 74, then 76, down to 59 for a day, then right back up to 68-69 again....in NOVEMBER!!!! ENOUGH. This is after months of temp spikes into the 90s! Why does CA experience 8 months of summer?!?! Even April was warm. October was actually worse than Sept was this year in terms of heat wave frequency. We'd have 3-5 days of nothing but increasing temperatures from 68 to 94 and it almost never dropped below a sickening 70 with 85% humidity. Not quite as humid anymore, but I'm STILL seeing mosquitoes! In November! This week, we're getting gross tule fog, you know the kind that typically socks the coast in after a bad summer heatwave. We shouldn't be getting steamy tule fog in November. Where is that high, thick, grey, freezing stuff that holds in all the frigid temps in the low 50s? My family thinks I'm nuts for keeping my screened windows wide open at night this time of year. It's freaking HOT compared to the way it SHOULD be and there's no wind, either. I spend most of the year in jeans and t-shirts, even in "winter". It's rarely cold enough to even wear a long-sleeve jersey outside anymore. Add to that the devastation caused by the annual apocalyptic fires from the Santa Ana winds, which unfortunately we're now famous for, and it's a recipe for a revolting fall. We don't even have "fall" or so-called season changes anymore. Our seasons basically range from spring to official summer, late summer, Indian summer, very late summer, pre-holiday summer, and then maybe a month or two of mild temperatures around the holidays with rain if we're lucky. I am so tired of seeing our state in brick red and bright orange colors on every single map while the rest of the country is blue and dark blue by now. We need blizzards and real cold for a change, and I'm talking temps in the 20s and 30s. That would be considered practically a record low for CA, but a "heatwave" in places like New York this time of year. I don't want to see a day over 55 degrees for at least 4 months. I also detest that stupid jet stream. That thing ALWAYS "humps" right over CA perfectly so those repulsive high-pressure systems can fester over the coast for days at a time, while the rest of the country is getting arctic blasts. I'm not saying I want Day After Tomorrow to hit, but why can't we just have some kind of season change like other states? Even Oregon experiences more season changes than we do and we're just one state south.

Sick of California weather

Im a cali native. Grew up in Orange County and moved to the central coast in 1994. This area is staying consistently warm. Im SO done with the crappy warm weather. I would love cooker temps where it actually feels like Fall and Winter! I want rain and cold temps! Even snow!

***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.