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

August 2020 Long Range Weather Forecast for Pacific Northwest
DatesWeather Conditions
Aug 1-8Sunny, warm
Aug 9-23Showers and t-storms, cool
Aug 24-31Sunny, turning hot
Augusttemperature 64° (2° below avg.)
precipitation 2.5" (1.5" above avg.)

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.)

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

Leave a Comment


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.

why the high?

The Editors's picture

Believe it or not, the Arctic influences conditions in the mid-latitudes. Ocean temps also play a big roll. They both “move” (help to set the course for) the jet stream. And there are other influences at work. The common factor? We’re all in this together.


What do you mean when you say that geo-engineering has dried us to a crisp? When? How? Do we even know how to do this yet?

Kinda frustrated

Your predictions have been off for the last year and 1/2. It has been blazing this summer, yet your predictions have been for cool or cooler weather. Why are you so off? Last winter your predictions were for a lot more snow than we saw, so what gives? Not sure I want to even buy your books anymore. They are not helpful.

kinda sorry

The Editors's picture

Seriously, we appreciate that you put your faith in our forecasts. We do, too. However, there are many “moving parts” (mitigating factors) that influence weather, including—playing a big roll—the warming Arctic. No doubt, you’ve heard about warming oceans, and the jet stream, and other things. They all contribute. Traditionally, our forecasts are 80% accurate, not 100% accurate but we appreciate that you and other want them to be. (We do, too.) Thank you for taking the time to share your thoughts.