2020-2021 Long Range Weather Forecast for San Jose, 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 2021 Old Farmer’s Almanac, available online and in stores.

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

Free 2-Month Weather Forecast

November 2020 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Nov 1-8Rain, then sunny, cool north; sunny, turning warm south
Nov 9-15Scattered showers, cool
Nov 16-19Sunny, warm
Nov 20-30Rain, then sunny, cool
Novembertemperature 56° (2° below avg.)
precipitation 0.5" (1" below avg.)

December 2020 Long Range Weather Forecast for Pacific Southwest
DatesWeather Conditions
Dec 1-6Rainy periods, cool
Dec 7-12Sunny, cool
Dec 13-16Showers, cool
Dec 17-22Sunny, warm
Dec 23-31Sunny, cold
Decembertemperature 52° (2° below avg.)
precipitation 0.5" (1.5" below avg.)

Annual Weather Summary
November 2020 to October 2021

Winter will be cooler and drier than normal, with below-normal mountain snows. The coldest temperatures will occur in late December, late January, and mid- to late February. The stormiest periods will be from late January into early February, mid- to late February, and late March into early April. April and May will be cooler than normal, with rainfall below normal in the north and above normal in the south. Summer temperatures will be cooler than normal inland and warmer near the coast, with slightly above-normal rainfall. The hottest periods will be in mid-June and mid- to late August. September and October will be warmer and rainier than 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 2020 to October 2021

Temperature and Precipitation Chart, November 2020 to October 2021 for San Jose, CA

Reader Comments

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Catch up

The only "rainy period" we had in Oceanside was on the 25th of October. First rain of this month. The Almanac finally caught up today the 27th. It's sunny and definitely cool with 45 degrees.

Farmer's Almanac Forecast

The Farmer's Almanac forecast would most certainly be FAR more accurate were it not for the fact that we humans have burned so much fossil fuel that we have completely changed the atmospheric composition of our planet, therefore changing our weather patterns which used to run in somewhat more predictable cycles! We as humans have raped and misused our planet and NOW are paying the price for being poor custodians of a fragile ecosystem that has become completely out of balance, look at what the Industrial Revolution of the 1800s along with the "Technological Revolution" of current times has done for planet Earth! I only hope we are not past the ecological tipping point and we as humans can forestall the coming higher temperatures associated with global warming and climate change by changing our old energy use and production habits and avoid another ice age!

temperatures

None of this is even close to being correct. It is always cooler than what is predicted or hot, much hotter than predicted. It is not worth the post to have this website. 118F in the San Fernando Valley of Los Angeles is just wildly crazy. That is Death Valley weather and no one really wants to live there.

the heat

The Editors's picture

Thanks to all of you for writing. This has been an exceptional year for you folks on the West Coast. Recognizing but not having space or time to explain how many factors–including ocean temps–affect the weather, here is an explanation from our meteorologist of how we make our forecasts averages. This does not excuse any accuracies (or inaccuracies) but is an attempt to put some of this in perspective: 

The average monthly temperature is the average of the high and the low temperatures for the month.  Keep in mind that this applies to the region as a whole, rather than a specific location.  So, for example, while the region might show an average temperature of 50, a particular location that is warmer than most spots in a region might have a normal high of 65 and a normal low of 47 (for a normal average temperature of 56).  The way I calculate the average temperature for a region is by looking at a map showing the “official normal” temperatures for locations in the region (which are averages of the past 30 years, updated every 10 years), and calculating an average for the region, eye-ball weighted by area and also population.  So, to give a simple example, if the average of all locations in a region is 48 (counting all areas equally), but the two big cities (with much of the region’s population) average 54, I might use 50 or 51 as the average for the region as a whole.

Hot....

It doesn't seem like it. It's like an inferno today. I'm here in Ventura county 5 min away from the beach with 90+ degree weather, it's terrible.

Completely off - again

Wrong, again...and as usual. It's mid-October and temperatures are SCORCHING (high 90s...for a WEEK). And no rain. At all.

I don't know why anybody uses the Farmer's Almanac which is presumptive and sounds apparently uses 1820s technology. It has been wrong every. Year. For. The. Last. Five. Years. EVERY YEAR. Do NOT rely on the Farmer's Almanac. The statisticians are using models that no longer work.

Now We know

Been stocking up on blankets headgear boots etc. Gonna be a bad winter.

Too bad it's wrong

Temps in the 100s here in the coast valley forge straight days. Its October for Petes Sake! Add the thick layer of smoke and you've got Dantes inferno. What is going on??

Heat came early.So what!

The heat came early. Better hope rain comes early as well. The entire west coast needs rain asap.

Inaccuracies are OK

People leaving angry comments obviously don’t understand an almanac is for “predictions.” If the weathers different, change your clothes don’t cry on the internet about it.

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