2019-2020 Long Range Weather Forecast for Intermountain

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 2020 Old Farmer’s Almanac, available online and in stores.

Note: Long range forecasts are regional, not city-specific.

Free 2-Month Weather Forecast

September 2019 Long Range Weather Forecast for Intermountain
DatesWeather Conditions
Sep 1-5Showers, cool north; sunny, hot south
Sep 6-9Sunny, cool
Sep 10-18Sunny, warm north; scattered t-storms, cool south
Sep 19-24Isolated t-storms, warm
Sep 25-30Sunny, chilly
Septembertemperature 62° (avg.)
precipitation 0.5" (0.5" below avg.)

October 2019 Long Range Weather Forecast for Intermountain
DatesWeather Conditions
Oct 1-5A few showers, cool
Oct 6-13Sunny, warm
Oct 14-19Sunny north, showers south; warm
Oct 20-23Showers north, snowstorm south
Oct 24-31Rainy periods, cool
Octobertemperature 53° (2° above avg.)
precipitation 1.5" (0.5" above avg.)

Annual Weather Summary
November 2019 to October 2020

Winter temperatures will be above normal, on average, in the north and below average in central and southern portions of the region, with the coldest periods in mid- to late December and early January and from late January through the first half of February. Precipitation and snowfall will be above normal, with the snowiest periods in mid- to late December, early and late January, early February, and early and late March. April and May will be cooler than normal, with near-normal precipitation. Summer will be slightly cooler and rainier than normal, with the hottest period from late June through early July. September and October will be warmer than normal, with below-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, Kayenta, Page, Tuba City, Winslow), CALIFORNIA (Cedarville, Davis Creek, Eagleville, Fort Bidwell, Lake City), COLORADO (Aurora, Colorado Springs, Denver, Fort Collins, Lakewood), IDAHO (Boise, Idaho Falls, Meridian, Nampa, Pocatello), MONTANA (Bozeman, Butte, Helena, Kalispell, Missoula), NEVADA (Carson City, Elko, Reno, Sparks, Sun Valley), NEW MEXICO (Angel Fire, Chama, Dulce, Questa, Springer), OREGON (Hermiston, La Grande, Ontario, Pendleton, The Dalles), UTAH (Ogden, Orem, Provo, Salt Lake City, West Valley City), WASHINGTON (Kennewick, Pasco, Richland, Spokane, Yakima), WYOMING (Casper, 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 2019 to October 2020

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

Reader Comments

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Forecasting will become more like 50%

Unfortunately, we are past the tipping point, and due to the historical models that relied on the reflective properties that reflected th e suns radiation is all but gone for months at a time. I hate yo say it, but I fear the long term forecasts that rely on historical trends will cause annual releases with quarterly updates to take count of global events from melting ice, volcanic debris, and more frequent "large" fires that locally add a smoke layer that also maintains heat.

I love your work guys, any insight on your expected challenges?

Just curious. Thanks

this week's forecast

I love to rely on the Farmer's Almanac for weather; however, today we are expected to reach 106! This is not exactly the "cool" (Aug 9-13 Sunny, cool north; scattered t-storms south) that is indicated...lol

106°F

So right, and that fact may be the factor that reinforces our 80% (not 100%) accuracy rate. Thanks for keeping tabs, especially with an LOL.

On a more serious note, as an article set for the 2020 edition will show, the high temps are due in part to the warmth at the North Pole and surroundings. Thanks again—

Ontario, OR

we are seeing TRIPLE DIGITS. been hot for days, gonna be hot for days

What's winter looking like?

Hey I was wondering what winter 2018-2019 will be looking like for Ontario Oregon. Or malheure county in general

North west Colorado

Temperatures are a little higher than normal here, about 90-95 most days, nights are down to the mid 50's- almost no precipitation. I think it has rained about a total of an hour in the last month and a half. with wildfires happening almost daily it seems, most folks here are harvesting early for fire prevention sake. we can see the rainfall to the north and south of us, but its skipping by us every time. someone do a rain dance for us.

June

I am farming lavender in the Mission Valley 45 miles north of Missoula. My harvest season is over a week late to start compared to previous years because of the cool and very rainy weather. It feels like Portland!

Above Average

States this week it's supposed to be sunny:cool. Our local weather is predicting 101-106F for the next 3 days straight. No relief in sight for the Reno, Nevada area.

A Memorable Memorial Weekend

In Butte, MT we are seeing a first, lilacs opening by Memorial Day; typically have our last snow storm this weekend.

Above Average

Here in Reno, we are seeing 5-10 degrees above normal temps. Today is supposed to hit 90F. We see no clouds, or precipitation in sight.

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