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

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

Free 2-Month Weather Forecast

April 2019 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Apr 1-4Rain, then sunny, cool
Apr 5-10Sunny, cool
Apr 11-19Showers north, sunny south; cool
Apr 20-30A few sprinkles, cool
Apriltemperature 59° (1° below avg.)
precipitation 0.5" (0.5" below avg.)

May 2019 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
May 1-5Sunny, hot inland; A.M. sprinkles, P.M. sun coast
May 6-14Sunny north, A.M. sprinkles south; cool
May 15-20Sunny; hot north, cool south
May 21-31Isolated showers, cool coast; sunny, turning hot inland
Maytemperature 62.5° (1° below avg.)
precipitation 0.4" (0.1" below avg.)

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 Luis Obispo, CA

Reader Comments

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Why are you so mad about this small thing?

Bay Area rains

Sometimes we wish we were wrong, too. Hope you get some relief, Sarah. Thanks for letting us know you care so much!

Pretty much useless

They keep updating their forecasts after the event has happened! Bogus models and antiquated and dated approach. Sorry. Get in with the times


The Editors's picture

We do not change our long-range forecasts after they have been published. Our forecasts are created up to 18 months in advance based on a number of factors, including solar activity, historical and forecasted weather patterns, and atmospheric conditions. As climate science has evolved, so have our forecasting methods, though we still rely on the basic theory that our founder used 228 years ago.

If you are looking for the latest, up-to-the-minute weather info, then I’m afraid our forecasts won’t be of much help. However, if you want to get a general idea of what weather to expect five months from now, our forecasts are the ones to use—and with an overall average accuracy of 80%, we still have faith in our methodology!

Yosemite waterfalls in September

Any idea if there will still be water flowing in the waterfalls in Sept. 2019, based on the current snow pack and rainfall? My husband and I are planning to visit the Valley from Sept. 1 or 2 to the 7th. When I went in August 2014, the waterfalls were all dry. :-( What's your best guesstimate as to this year? Thank you!


the Best time to see the Falls is May to June... I would go in May... the will be flowing well after that is get less very quickly. there is a website for Yosemite that will have more information and lots of pictures... Don't forget to see the Giant Sequoias, They are in the same area just a short distance away. Also in Kings Canyon Nation Park.. Grant Grove. Enjoy...

Weather, climate, change/no change man made or not

I read lots of stuff from all sorts of sources, from "shlock" to peer reviewed journals, and while I think this came out about a year ago in "Nature", I am not positive as I tossed the magazine before I copied the article; but the article stated that at least five planets are warming - Mercury, Venus, Earth, Mars and Jupiter. Because the first two are sunward of us and solar winds blow out from the sun past them to Earth, etc., I think that is pretty good proof that, while we are not the best stewards of the planet, and can/must do better, we are not the primary cause of global warming. By the way the easiest way to cool the planet (which as an asthmatic, who loves warm weather I do not want) is just to pollute the air more, see studies on temperature drops after major volcanic eruptions. The most easily researched is the early 19th century "Year without a Summer", following the relatively small eruption of an Italian volcano. We are also in a dither about carbon dioxide, which people and animals exhale, we just need to plant more greenery as plants take in CO2 and release oxygen. Also, despite the rantings about methane levels it appears from the most recent studies that that is a result of warming, not a cause, and methane deteriorates rapidly, anyway. By the way, when did cows become the bad guys, I have found most of them to be very sweet.

I think it should not be raining so much for so long for four mo

I think it should not be raining for so many days. It is getting very tiring for people in Modesto California....

Love/hate rain

I agree that the rain for us here in California is at irritating levels now but thank God for the 2 inches above normal because 3 years ago I can not tell you how sad, with tears, I was when I saw the docks hanging down the side of the embankments of the lake as we were going past Mt. Shasta's area. The water levels were 15 to 20 feet from the end of the dock to the actual water line. I grew and lived in Washington state,say no more...

Tired of rain

It's getting pretty tiring for those of us in Sonoma too