2020 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

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 Pacific Southwest Region

Reader Comments

Leave a Comment

What will the weather be like in Santa cruz California the first

What Will the weather be like the first week of January 2019 in Santa cruz California

Wedding in April versus July in Berkeley, CA

Hi,

We are planning a wedding for either April 18th or July 3rd, 2019 in Berkeley, CA. This seems to say that the summer months may be warmer than normal. Do you think it will be too hot in July for our guests who are from Ireland? As you know, many homes and buildings in the Bay Area don't have air conditioning. So we are wondering if we should switch from our July date to April. The wedding is at an outdoor/indoor venue and I'm not sure if the indoor hall has air conditioning.

Thanks for your thoughts,
Brooke

Berkeley Weather

Berkeley never gets 'hot'. Very few days in the 80's and super rare would be in the 90's. Either month is great weather. Congratulations!!

Berkeley weather

Also depends on venue. I went to a wedding at the Brazilian room in July during a heat wave. No AC. No fun, especially since i was 8 months pregnant. If there’s AC, July should be fine. April would be nice as well.

Weather in Berkeley

There is a lot less fog in April than July. We were overseas guests may appreciate sightseeing without the heavy fog

Go with the April date,

Go with the April date, guests always love to be cooler rather than hotter. :)

Choose April

It will be extremely hot for your wedding guests from Ireland in July. I can't stress that enough. The summers here are very different and too warm for a July wedding in my opinion, especially w/o AC. It'd be miserable. I recommend April.

....Choose April

To add.....A heat wave in Ireland is 77°, Berkeley in July is at least this temp. April is the best option.

Big bear city, ca

Weather for November

Weather for Big Bear in

Weather for Big Bear in November should be mid 40s to low 50s during the day and mid to low 30s at night. Rain should be throughout. It doesn’t really snow up here until around January.

Pages