2018-2019 Long Range Weather Forecast for San Francisco, 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 2019 Old Farmer’s Almanac, available online and in stores.

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

Free 2-Month Weather Forecast

December 2018 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Dec 1-3Sunny; cool north, warm south
Dec 4-10Rainy periods north, sunny south; mild
Dec 11-18A few showers, mild
Dec 19-23Rain north, sprinkles south; mild
Dec 24-31Rain, some heavy; chilly
Decembertemperature 55° (0.5° below avg. coast, 2° above inland)
precipitation 1" (1" below avg.)

January 2019 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Jan 1-3Rainy periods, cool
Jan 4-11Rainy periods north, sunny south; mild
Jan 12-13Showers
Jan 14-23Sunny, cool
Jan 24-31Rain, then sunny, mild
Januarytemperature 54° (avg.)
precipitation 4" (3.5" above avg. north, 1.5" 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 San Francisco, CA

Reader Comments

Leave a Comment

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?

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?

Rain wanted!!!


I'm dying for it to rain here in the SF Bay Area. I live on the Peninsula in East Palo Alto. I just want rain, I miss it so much and everything is getting so dry. This is my first time at this website. Do you all find that the weather predictions here are accurate? Like its says it will rain in No. CA in early to mid-November. Do you think my wish will come true???


RE: Rain Wanted

I am with you Susan. We live in Fremont and I am dying for some rain. I really do not like this warm/hot/humid weather we have right now going into November. I want the rain and the cold!

Outdoor fundraising event April 20 or May 4?

I'm concerned about rain on April 20 for an outdoor event. I'm trying to figure out if we should change it to May 4.

April 27th for a wedding in Camarillo

How will the weather be for April 27, 2019 for a wedding in Camarillo, CA?


There is no way anybody can predict what the weathers going to be that far out. I hope you have a nice wedding though.statistically speaking it should be dry in that area on April 27