2019-2020 Long Range Weather Forecast for San Luis Obispo, 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 2020 Old Farmer’s Almanac, available online and in stores.

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

Free 2-Month Weather Forecast

December 2019 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Dec 1-4Sunny, cool
Dec 5-12Isolated showers, turning warm
Dec 13-19Sunny, cool
Dec 20-24Rainy, cool
Dec 25-31Sunny, then rain; cool
Decembertemperature 52° (2° below avg.)
precipitation 1" (1" below avg.)

January 2020 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Jan 1-3Showers, cool
Jan 4-17Sunny; cool coast, warm inland
Jan 18-20Sunny, cool
Jan 21-28Rainy periods, cool
Jan 29-31Showers, mild
Januarytemperature 53° (1° below avg.)
precipitation 2" (1" below avg.)

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 San Luis Obispo, CA

Reader Comments

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Northern California

Middle California and Southern California have very different climates during the winter than Northern California. Starting at the Sutter Buttes and going to the Oregon border, is Northern California. Yes, we get the heat but, the mountains get more snow and the climate is cooler in the winter. Sacramento and the Delta/Bay areas get lots of fog. We are drier. Please don't lump Northern California with the rest of the state-so that we can have more accurate forecasts in the future.

You are wrong

California has four main climate regions and 3 climate zones. The zones are a subtropical climate zone, a hot tropical climate zone which is Southern California, and
the temperate climate zone Which is Northern California. The Climate regions are as follows Northern California, Pacific North West climate, Central Calfornia climate, Southern California climate, Pacific South West Climate. California also has a Mediterranean climate.

Northern & Southern Calif

I totally agree. Our Southern Calif climate is not like that of San Francisco and points farther north. In SoCal, we have a Mediterranean climate, and except for occasional heat during July to Sept, it is very pleasant.

I think your close ...

Southern California does have semi-Mediterranean climate, but in cities that are next to the ocean. Inland temperatures and precipitation typically mirror those of a more arid, desert climate with lower precipitation and colder temperatures in winter and much drier and hotter temperatures in summer. The California area has such varied climates that are not far from one another, it’s interesting to live there, ridiculously expensive yes, but still a great place to live (if you avoid the traffic :) ).

Change your Definition

I'm am right on board with the writer of "CHANGE YOUR DEFINITION OF PACIFIC SW". There are two completely different halves of California climate. Los Banos to North have a wetter climate, cooler temps and plenty of water. From Los Banos South the climate is dry with hotter temps and lack of water.

Riverside County

What kind of weather can the Riverside county expect from October 2019 into January 2020? Last year we had a very nice and unusually chilly Thanksgiving holiday. I was just wondering if we should expect the same this year. Please advise/thank you!!!

Up coming 2019 & 2020 rainfall

Can't you give us an idea of our 2019 & 2020 rainfall for San Francisco Calif.? Just an idea---
Thank You

Rain prediction in San Francisci Ca November 2019

Planning a homeless outreach in San Francisco Ca on September 16, 2019 and would like to know the prediction of rain. Thank you

Winter 2018-2019 rainfall

Winter rainfall for the south turned out to be inaccurate and just the opposite of what you predicted. Rainfall in California was actually ABOVE normal, so much so that it ended the drought all over the state.

Amy you are wrong

The drought actually ended in 2017.