2019-2020 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 2020 Old Farmer’s Almanac, available online and in stores.

Note: Long range forecasts are regional, not city-specific.

Free 2-Month Weather Forecast

September 2019 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Sep 1-4Sunny; hot north, warm south
Sep 5-10Sunny, cool
Sep 11-20Sunny, hot inland; A.M. sprinkles, P.M. sun coast
Sep 21-23Sunny; turning hot north, warm south
Sep 24-30Scattered showers, cool
Septembertemperature 70.5° (2° above avg. coast, 1° below inland)
precipitation 0.5" (0.5" above avg. north, avg. south)

October 2019 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Oct 1-4Sunny, cool
Oct 5-11Sunny, turning warm
Oct 12-19Sunny, warm north; A.M. sprinkles, P.M. sun south
Oct 20-25Rainy periods, cool
Oct 26-31Sunny, cool
Octobertemperature 65° (1° above avg. north, 1° below south)
precipitation 1.5" (2" 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

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?

Pages