2020-2021 Long Range Weather Forecast for Gresham, OR

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

December 2020 Long Range Weather Forecast for Pacific Northwest
DatesWeather Conditions
Dec 1-3Rainy periods
Dec 4-8Rain and snow
Dec 9-13Sunny, cold
Dec 14-22Rainy periods, mild
Dec 23-26Sunny, cold
Dec 27-31Rainy periods, cool
Decembertemperature 45° (2° above avg.)
precipitation 7.5" (avg. north, 2" above south)

January 2021 Long Range Weather Forecast for Pacific Northwest
DatesWeather Conditions
Jan 1-8Rainy periods, turning mild
Jan 9-18A few showers, turning cold
Jan 19-24Rain, then sunny, cool
Jan 25-31Sprinkles and flurries, cold
Januarytemperature 44° (1° above avg.)
precipitation 3.5" (1" below avg. north, 4" below south)

Annual Weather Summary
November 2020 to October 2021

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

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 2020 to October 2021

Temperature and Precipitation Chart, November 2020 to October 2021 for Gresham, OR

Reader Comments

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Predicted Snowfall for Bend and Sunriver this winter?

Looking more for predicted snow fall patterns going into November-December 2018 and into the New Year. Is there a way to get this prediction here or somewhere? Not just looking for rainfall patterns, specifically snow. Thanks,

Not so good

August was waaaayyyyyy off. How certain can we be about this coming winter's precipitation? Isn't there an El Nino brewing?

Way off mark...

Mid-Willamette Valley in Oregon.... Hot, hot, hot....
No cool and sunny weather -- so far this August. No showers...
Though we might dip down from 96F to 78F in a couple of days. "Might".... if the weather predictions at Accuweather are correct.


We have gotten some rain here in Eastern Klamath county, we will have to wait and see about the snow.


we need snow and rain, this summer was hottest on record for years, now we hear snowfall may be less, any chance you could be wrong?


Cool and sunny on coast, all ?summer?

warmer summers

You address warmer Arctic conditions and the ocean temperatures effect on the jet stream, etc. And yes, most importantly we are all in this together. The geo-engineering has an effect on our weather (and your predictions) also. What are your thoughts on geo engineering and are you able to factor it into your weather predictions?

Weather Forecasts

The Editors's picture

Thank you for your question! It’s a good one. While we do not factor in geo-engineering directly, we do take into account the last 30 years of available climate data, which would account for any short-term changes in climate due to geo-engineering. Additionally, because our forecasts are only for the following year, the effects of geo-engineering and other man-made factors that are currently occurring may not be visible for many years.

Weather for pac nw

This is incorrect info. It’s been in the mid 90’s near Kent, Renton, for the past week. Smokey and HOT!!!!


The weather has not been natural for several years.
How can a high pressure system stay in place off the west coast for the last 6 years? The geo-engineering has us dried to a crisp after record rainfall last winter, here in western WA.
I am truly surprised they haven't set us on fire yet, like the rest of the west. It is still early in the "fire season", so time will tell.