2020-2021 Long Range Weather Forecast for Green River, WY

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 Intermountain
DatesWeather Conditions
Nov 1-6Snow showers, then sunny, cool
Nov 7-8Showers, mild
Nov 9-23Snow showers, cold
Nov 24-30Rainy periods north, sunny south; mild
Novembertemperature 38° (2° below avg.)
precipitation 1.5" (avg.)

December 2020 Long Range Weather Forecast for Intermountain
DatesWeather Conditions
Dec 1-4Sunny, mild
Dec 5-14Snowstorm, then sunny, cold
Dec 15-23Rain and snow showers, mild
Dec 24-31Snowy periods, turning mild
Decembertemperature 33° (2° above avg. north, 2° below south)
precipitation 1.5" (avg.)

Annual Weather Summary
November 2020 to October 2021

Winter temperatures and precipitation will be slightly below normal, on average. The coldest periods will be in early to mid-December, late January, and late February. Snowfall will be near normal, with the snowiest periods in early and late December, late January, and late February. April and May temperatures will be below normal in the north and above normal in the south, with near-normal precipitation. Summer temperatures will be cooler than normal in the north and above normal in the south, and it will be slightly rainier than normal. The hottest periods will be in late June, mid-July, and mid- to late August. September and October will be warmer than normal, with near-normal precipitation.

Map showing Old Farmer's Almanac long range weather region number 13

About the Intermountain Region

The Intermountain long range weather region includes all or part of the following states: ARIZONA (Flagstaff), COLORADO (Clifton, Grand Junction, Montrose), IDAHO (Boise, Idaho Falls, Meridian, Nampa, Pocatello), MONTANA (Bozeman, Butte, Helena, Kalispell, Missoula), NEVADA (Carson City, Elko, Reno, Sparks, Sun Valley), OREGON (Hermiston, La Grande, Ontario, Pendleton, The Dalles), UTAH (Orem, Provo, Salt Lake City, Sandy City, West Valley City), WASHINGTON (Kennewick, Pasco, Richland, Spokane, Yakima), WYOMING (Evanston, Green River, Laramie, Rock Springs).

Intermountain Neighboring Regions

Here are the regions that neighbor the Intermountain long range weather region:

Temperature and Precipitation November 2020 to October 2021

Temperature and Precipitation Chart, November 2020 to October 2021 for Green River, WY

Reader Comments

Leave a Comment

Early winter storms

Where in Idaho are you is the question. Here in Spokane we got snow in September and again in October and had freezes as low as 13°f. North Idaho got same. Frank's information is coming from his direct experience, which matches mine.

Frank I AGREE

Frank your comment was 100% correct!!

Beaver Dams

I went camping earlier (A few months back) and saw a beaver house by the water, it's layers were super thick this year, will it be a harsh winter this year?
- Jayden Smith

In North Idaho, the weather

In North Idaho, the weather was exactly how Frank Fontaine described. Two snow storms, one in late September and the other just a week and a half later. I’ve heard anywhere from expecting 200” of snow for Coeur d Alene area, to warmer than normal temps, to average precipitation. It really is just a guessing game at this point.

Winter Forecast

I love checking with OFA each winter for a forecast. I'm in the inland Northwest/western Montana and old-timers around here is saying we are in for a brutal, record-breaking winter - cold temps and snowfall. So it will be interesting to see who is correct - OFA or the old-timers around here. Update in April (when winter usually gets over).

Well I guess we shouldn't listen to your forcast

Intermountain precipitation for September "0.5" Actual: 10/09/19 1.78"; 10/ 11/ 2019 3.56" OOOOPS missed that one!

Snow

I love the farmers almanac weather predictions but the only thing I wish it had was a prediction for the amount of snow we might get. That would be awesome.

Snow Know

The Editors's picture

Hi, Chelsea: Thanks for this comment. With our forecasts, you can find out when we expect the heaviest snows to fall, but we have no way to predict the actual totals—right now. But you can be sure that if there is a way, we will find it, and you will be the first to know! Well, you and 3 million others. Thanks again—that would indeed be awesome!

Intermountain region

I have a real concern about your weather forecasts for the intermountain region. Back in the 1800s perhaps people in New England simply looked at this area as an amorphous "out west" and were not concerned with what may be happening to a few Indians and trappers 2000 miles away. So, to your early editors there was no difference between Fort Boise and Fort Tuscon. But this needs to change. The climactic difference between Flagstaff and Ontario, Oregon are never even remotely similar. Northern Idaho has completely different climate than Virginia City. Your forcast map covers an area over 1000 miles long and 800 miles wide. What you have now was "the Intermountain Region" needs to be divided into at least 4 different regions to even approach a scintilla of accuracy. Thanks for listening.

Mountain Man

The Editors's picture

Hi, Steve: Thank you for this observation. Your points are very well taken and apply to many more regions than just the Intermountain, as you no doubt realize. We are constantly looking at ways to make our forecasts more localized, and comments like yours are always taken to heart and appreciated. Thanks again!

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