2020 Long Range Weather Forecast for Pacific Northwest

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

September 2020 Long Range Weather Forecast for Pacific Northwest
DatesWeather Conditions
Sep 1-7Sunny, hot
Sep 8-15Showers, then sunny, hot
Sep 16-24Sunny; cool, then warm
Sep 25-30Rainy periods, warm
Septembertemperature 64° (3° above avg.)
precipitation 1" (0.5" below avg.)

October 2020 Long Range Weather Forecast for Pacific Northwest
DatesWeather Conditions
Oct 1-6Rainy periods, cool
Oct 7-13Rainy periods, mild
Oct 14-23Rain, some heavy; cool
Oct 24-31Rainy periods; cool, then mild
Octobertemperature 55° (1° above avg.)
precipitation 5" (2" above avg.)

Annual Weather Summary
November 2019 to October 2020

Winter will be warmer and rainier than normal, with below-normal snowfall. The coldest periods will occur in mid- to late December, early and mid- to late January, mid-February, and mid- to late March. The snowiest periods will occur in mid-December and early and mid- to late January. April and May will have near-normal temperatures, with below-normal rainfall. Summer will have slightly above-normal temperatures, on average, with above-normal precipitation. The hottest periods will be in late June, mid-July, and late August. September and October will be warmer and rainier than normal. The hottest periods will be in early and mid-September.

Map showing Old Farmer's Almanac long range weather region number 15

About the Pacific Northwest Region

The Pacific Northwest long range weather region includes all or part of the following states: CALIFORNIA (Arcata, Eureka, Fortuna, McKinleyville), OREGON (Beaverton, Eugene, Gresham, Portland, Salem), WASHINGTON (Bellevue, Everett, Seattle, Tacoma, Vancouver).

Pacific Northwest Neighboring Regions

Here are the regions that neighbor the Pacific Northwest long range weather region:

Temperature and Precipitation November 2019 to October 2020

Temperature and Precipitation Chart, November 2019 to October 2020 for Pacific Northwest Region

Reader Comments

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Climate change ... this is going to get worse till Co2 levels dr

You have to understand that c02 is the thermostat of earths biosphere. It really does regulate how much heat is allow to escape into space or hold onto it raising the temperatures. Earth has seen one case of climate change 52 million years ago. But that took thousands of years for animals to adapt. This time around, its only been 138 years since the industrial revolution where co2 has spiked 410 ppm. Co2 has normally moved up and down from 180 to 280 ppm for 6,000 years.


I work outside for a living and the weather patterns are scary I've never in 30 yrs experienced the heat we have had and now not enough snow pack stress on plant material I take care of is obvious I fear for my child and the earth she will and is inheriting

Western Washington Weather

Last year Old Farmer's Almanac stated that we would have a colder than normal winter here in the Seattle area and we didn't see any frost until near November, no snow until Christmas Eve. This year, it says we are to expect a warmer than normal winter.

If last year was colder than normal, then this year it might as well be a rainy summer. I'm hoping that the prediction is wrong and that it actually gets cold this year.

Snow in Olympia on November 3rd

It dumped last November 3rd in oly

whoa, your wrong

We had snow in November... where do you live? The ocean coast?

Been dry no rain at all.

October was very dry and sunny. Same as nov forecast shows sun through mid month. It's climate change, no longer can you predict the weather accurately based on past trends. Paradise ca whole town burnt where my family is. 3 family members houses burnt. 8 percent humidity in nov. Same as here in klamath region just 3 hours away. It's time to change the way you forecast. The old ways don't work anymore sorry.

So sorry to hear about your

So sorry to hear about your families homes, John.

Paradise fire cause climate change or negligent PG&E plus poor f

I moved from Colusa, Ca two years ago to W. Wa. I worked in sales and Paradise was part of my territory. I used to stop and buy antiques, it was so close to home. My husband grew up in Sebastopol near Santa Rosa. The fires there are nothing short of a travesty and possibly avoidable. Everyone laughed at Trump when he talked about raking the forest but forest rakes are real. They’ve been used for a long time and even tribal members would rake the debris from the forest floors for fire prevention and mgmt. it’s no longer legal to do this in Ca. There was a bipartisan bill that Brown vetoed last year while Santa Rosa burned that would have mandated forestry mgmt. He was off on a tour telling the world about climate change. Both of the recent cataclismic fires were caused by negligent power companies, not climate change. The climate is changing but that doesn’t mean we should lie about how these things happened. We need people to take responsibility for these things and prevent them from happening again. Saying they were caused by climate change lets the responsible parties off the hook. Don’t perpetuate the lies, be a part of the solution.

So accurate been reading since I was a little girl. 30 years now

I say 100% accurate even about the snow for Halloween days off snow coming down in mountain and we had hail as heavy as snow the week it said snow. Love this totally tell everyone about it.

Weather in Bend Oregon

Neither map gives a forecast for our area. We are right between the Pacific Northwest and the Intermountain Regions and neither has an accurate forecast for our area. We are located at the Eastern edge of the Cascades and the beginning of the high desert. It is kind of exasperating, trying to figure our forecast.....