2019 Long Range Weather Forecast for Pacific Southwest

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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 annual Old Farmer’s Almanac, available online and in stores.

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

Free 2-Month Weather Forecast

September 2018 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Sep 1-4Sunny, warm
Sep 5-17Sunny inland; am sprinkles, pm sun coast; cool
Sep 18-21Sunny, hot
Sep 22-28Sunny, turning cool
Sep 29-30Rainy north, sprinkles south; cool
Septembertemperature 69° (1° below avg.)
precipitation 0.5" (0.5" above avg. north, avg. south)

October 2018 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Oct 1-5Rain then sunny, cool
Oct 6-13Sunny, turning warm
Oct 14-18Rain, then sunny, cool
Oct 19-24Sunny, turning warm
Oct 25-28Sunny, cool
Oct 29-31Rain north; sunny, cool south
Octobertemperature 66° (1° above avg.)
precipitation 1.5" (2" above avg. north, 0.5" below south)

Annual Weather Summary: November 2018 to October 2019

Winter temperatures will be near or cooler than normal, with rainfall above normal in the north and slightly below normal in the south. The coldest periods will occur in late December, mid-January, and early February. Mountain snows will be near normal, with the stormiest periods in late November, late December, and early January. April and May will be cooler and drier than normal. Summer will be warmer than normal, with near-normal rainfall. The hottest periods will be in mid- to late June, mid-July, and late August. September and October will see temperatures above normal in the northeast and below normal in the southwest. Rainfall will be slightly above 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 2018 to October 2019

Temperature and Precipitation Chart, November 2018 to October 2019 for Pacific Southwest Region

Reader Comments

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Weather in Laguna CA - April 6th 2019??

Having a wedding in Laguna Ca April 6th 2019. WEATHER??? Later afternoon into the evening outdoors.

Please lend your expertise

Can you help predict the weather forecast, especially for precipitation, in California's Capay Valley in late April/May 2019? Another outdoor wedding.

April 6 2019

Having an outdoor wedding April 6th. What is the weather forecast? Please please please tell me dry!

San Jose CA Long Range Forecast 2018-2019

I firmly believe that from San Jose CA south we will see a drier and warmer than normal Winter/Spring as Fall will be warmer and drier than normal. My theory is if summer has been warm and with the major wildfires CA has had and with predictions of more fires for the Fall the warming from the fires and particles could lead to a higher chance of a drought.

I think that CA from San Jose south may be in for another long stretch of dry weather despite the El Nino forecast. The resilant ridge of High Pressure that was in effect during our last multi-year drought and the lack of sunspots may constitute for the Old Farmers Almanac to rethink their Long Range Forecast.

If we have a lot fo sunspots during an El NIno/La Nina Year think 1998 more flooding will occur due to the Pineapple Express.

Do you predecct above normal percipitation in the form of major Pineapple Expresses with mudslides along Highway 1?

Will San Jose CA be in for a drier than normal winter/spring for 2018-2019?

April 6 2019

The wedding is in Pasadena ca

Will there be higher than

Will there be higher than normal rainfall for the High Desert of Southern California this coming Winter?

Winter weather

When will we be getting a substantial amount of rain and snow in lake Arrowhead ca.

Weather prediction

Hi. When will there be snow in Big Bear from Nov '18 to Mar '19 (winter)?

snow in Big Bear

Hoping around Halloween we receive our first snowfall. Check out my youtube channel.

This summer

What are we looking at for late July to early August? Do you anticipate very hot temps in San Jose (90s or higher) or will it be more reasonable - or can we just not predict that very accurately yet?

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