2020-2021 Long Range Weather Forecast for Spearfish, SD

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 High Plains
DatesWeather Conditions
Nov 1-8Snow showers, then sunny, mild
Nov 9-15Snow showers, then sunny, cold
Nov 16-23Snow, then flurries, very cold
Nov 24-30Sunny, mild
Novembertemperature 35° (1° below avg.)
precipitation 1.5" (0.5" above avg.)

December 2020 Long Range Weather Forecast for High Plains
DatesWeather Conditions
Dec 1-2Sunny, mild
Dec 3-9Snowy periods, very cold
Dec 10-17Sunny, mild
Dec 18-23Rain and snow showers, mild
Dec 24-31Snowy periods, cold
Decembertemperature 29° (1° below avg.)
precipitation 1" (1.5" above avg. north, 0.5" below south)

Annual Weather Summary
November 2020 to October 2021

Winter will be milder than normal, with the coldest periods in mid-November, early to mid- and late December, late January, and late February. Precipitation will be above normal in the north and slightly below normal in the south. Snowfall will be above normal in most places, with the snowiest periods in mid-November, early and late December, mid- and late January, mid- to late February, and early March. April and May will see temperatures above normal in the north and below normal in the south, and overall the months will be slightly rainier than normal. Summer will be warmer than normal, with the hottest periods in early and late June, early and mid-July, and early to mid-August. Rainfall will be near to below normal. September and October will have below-normal temperatures, with precipitation below normal in the north and above normal in the south.

Map showing Old Farmer's Almanac long range weather region number 12

About the High Plains Region

The High Plains long range weather region includes all or part of the following states: COLORADO (Aurora, Colorado Springs, Denver, Fort Collins, Lakewood), KANSAS (Dodge City, Garden City, Liberal), MONTANA (Billings, Great Falls), NEBRASKA (Kearney, Lexington, North Platte, Scottsbluff), NEW MEXICO (Clovis, Portales), NORTH DAKOTA (Bismarck, Dickinson, Mandan, Minot, Williston), OKLAHOMA (Guymon), SOUTH DAKOTA (Pierre, Rapid City), TEXAS (Amarillo, Borger, Dumas, Hereford, Pampa), WYOMING (Casper, Cheyenne, Gillette, Sheridan).

High Plains Neighboring Regions

Here are the regions that neighbor the High Plains long range weather region:

Temperature and Precipitation November 2020 to October 2021

Temperature and Precipitation Chart, November 2020 to October 2021 for Spearfish, SD

Reader Comments

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Laporte , CO April 3-6, 2020

Weather for those dates? Wedding will be then!! TIA

Nov 26-Dec 2

I'm making a round trip from St Louis to Salt Lake City, via Denver, and back on Dec 2nd. Expected weather between Denver and SLC both ways? Thanks!

November 2019 in Colorado

Hi. My family is planning it's first ever vacation out west beginning around November 21 through the end of the month. We would like to do a road trip between Denver and Las Vegas, but are unsure which city to start in without knowing what kind of weather to expect. If the weather in Colorado is going to be rough, we thought we would just us LV as a starting point and go in a different direction. Can you tell me what to expect in and around Denver in late November? Many thanks.

March 2020 Wedding

Hi There! I am getting married March 14, 2020 in Littleton, what do you think the weather will be like? Thanks!


It will be snowing. That is the snowiest month of the year for Colorado

Wedding Weather 6/12/20 - Denver

Hi there! What’s the weather looking like for a 6/12/20 wedding in Denver? Thank you so much!

Weather June 2020

Congrats! That's a gorgeous wedding date in Colorado...we got married a week earlier and in the last 15 years have never had a bad weather day then. We did have an afternoon storm on our wedding date which is really common...they pass quickly but often include lightening from about 4pm-6pm.

High Plains ...

I live in upper north east Wyoming ... Last year was said to be a milder winter .. Which it was until 2019 hit then it was brutal , we had almost 30 days of below freezing and heavy snow . I guess my point i'm trying to make is expect the worst and hope for the best .

Where can I find Oct. 2019 for high plains?

The website says 60 days forecast but it’s giving this month (Aug) which has already taken place, and next month (sept). Then long term skips October completely, which is only 32 days from now, and starts with November. I’m specifically looking for first weekend in October for Ft Collins, Colorado and I’ve checked back every week for all of Aug and still nothing for Oct.

Weather in Denver CO Feb. 26 to Mar. 3, 2020

Need to see what weather will be for the timeframe above. Thanks.