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