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

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 San Luis Obispo, CA

Reader Comments

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Hey y'all! El nino or el Nina really going to hit San Diego?

Ok I'm a weather junkie! I love crazy weather I hate how sunny it is in San Diego! My question is......... do we have a el nino really coming up? Like I need rain! Is San Diego going to get before or after thanksgiving? I seen on Facebook San Diego isn't looking good for a el nino or el Nina. I have my fingers crossed we have a strong el nino making it's way! Please let me know if anyone has a time frame or know if it's even going to happen. Thanks:)

Niña is a feminine word, “La

Niña is a feminine word, “La niña” not el.

El Niño

The Editors's picture

We, and the National Weather Service, are predicting a weak El Niño.

No rain in the valley

No rain in October and we're now in November I live in Modesto California and it hasn't rained I'm kind of worried. My question is, is the government messing with our weather? Or are we going through major climate change? It seems to me like the whole world is changing and not for the good

Any rain between Nov 28th and

Any rain between Nov 28th and Dec 4th for Los Angeles/Hollywood area ?

The weather and climate change

Our weather is normal cycling. We’ve had several ice ages. For 5 billion years we’ve had cycles. Don’t buy in to all the hysteria. You’ll be dead and long forgotten before humanity is challenged by weather changes.

Climate change

Wow, I guess you know better than 100s of scientists who have studied the issue for their entire lives. Wishful thinking won’t stop the freight train that is upon us. But go ahead, buy some beachfront property in the Florida keys if you’re so sure.

Dry November

hi all i,m a retired US Navy meteorologist here in San francisco, I grew up in the lower Sacramento valley near Galt. the weather the last few years has been anyhting but normal, which leads me to the new belief that this is the new normal. my studies show that for the exception of 2017 when the storm door was wide open from Oct (16) all the way to May, the State has been dry especially the first few month of the rainy season Nov, Dec, and Jan. which climate wise is our wettest period . Now its 2018-19 rainy season and here we go again. looking forward at the forecast models its dry for the rest of the month. maybe a weak system around the 18th , but its looking less likely as we mover along through the Month. i love the rain its the Atmosphere in motion, hopefully i am going to be wrong in my forecast for the new normal.

Dry November and December

I agree with Mike that it will be a dry winter. In particular, it would be nice to have a white winter in Yosemite Valley; alak and forsoothe, I predict no rain or snow for Yosemite Valley, just the same old warm, sunny days. It hasn’t been cold in the valley at all for the month of October. October also ‘boasted’ one or two days of rain and the autumn leaves did not show with the brilliant colors like they did in October 2016. Hope I’m wrong.

Dry Winter 2018? What day you now?

Robert,
It’s been raining consistently for 2 weeks now through the end of November and into the first part of December 2018. You were hoping to be wrong - congratulations, YOU WERE WRONG!

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