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.)

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 Gresham, OR

Reader Comments

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Ontario, Oregon

The Editors's picture

Geographically, Ontario—indeed, Oregon—is considered NW (to be in the northwest). However, for purposes of Almanac forecasts, Ontario is in the Intermountain region. Oregon falls in two of our forecast regions: The area more or less east of the Cascades is in the Intermountain region, number 13. (Intermountain being between the mountains; in this case, the Cascades and the Rockies.) The area more or less west of the Cascades is in the Pacific Northwest, number 15. The “shapes” of the regions `are based on the climatological movement of weather systems. Or, in very simplified fashion, the way the winds blow—the winds being jet streams, oscillations, etc. Inevitably some locations will “sit” on the border of two (or more) regions.

You will see, below the map on the following link page, that Ontario, Oregon, is one of the cities in Region 13: https://www.almanac.com/weather/longrange/region/us/13

Thanks for your interest in The Old Farmer’s Almanac.

Left out

Your weather forcast is totally leaving us in Central Oregon out of the picture. Our climates here range from high desert to mountain. Please include a forcast for us too! Maybe Redmond Oregon? Thank you

central Oregon

The Editors's picture

Oregon falls in two of our forecast regions: The area more or less east of the Cascades is in the Intermountain region, number 13. (Intermountain being between the mountains; in this case, the Cascades and the Rockies.) The area more or less west of the Cascades is in the Pacific Northwest, number 15. The “shapes” of the regions `are based on the climatological movement of weather systems. Or, in very simplified fashion, the way the winds blow—the winds being jet streams, oscillations, etc. Inevitably some locations will “sit” on the border of two (or more) regions. In that case, we suggest that you read the forecast for the adjacent region/s as well. And consider that our forecasts are deviations from normal, or average, conditions. (Local meteorologists might refer to above/below normal or average conditions on a given day; they are using the same calculations that we use. We are not suggesting that they use our forecasts; but the 30-year period on which norms and averages are based is universal.)

For a more specific forecast for your area (Redmond or any place), use this: https://www.almanac.com/weather/forecast

 

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