Weather

Weather

Weather in western North Dakota can be harsh, with extremes in temperature and sudden, violent storms. Be prepared for rapidly changing conditions.

Climate

Summers are warm with average high temperatures in the 80s-90s May through September. Winters are cold with average lows in the single digits December through February.
Wind is considerable year-round.
Travelers should be aware of the potential for violent thunderstorms in the summer and the possibility of blizzard conditions in the winter.

Temperature

The hot season is June to September, with an average daily high temperature above 75°F. The hottest day of the year is July 30, with an average high of 86°F and low of 59°F.

The cold season is November to March, with an average daily high temperature below 35°F. The coldest day of the year is January 3, with an average low of 4°F and high of 22°F.

Forecasts

NOAA Weather Forecast for Fort Union Trading Post NHS

Monthly Averages

Month Average Maximum
Temprature
(F)
Average Minimum
Temprature
(F)
Jan 21 0
Feb 27 6
Mar 40 18
Apr 56 30
May 68 41
June 77 51
July 85 56
Aug 84 54
Sep 72 43
Oct 57 31
Nov 38 17
Dec 25 4





















Last updated: April 7, 2018

Contact the Park

Mailing Address:

15550 Highway 1804
Williston, ND 58801

Phone:

(701) 572-9083

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