Williston Average Rainfall by Month

This page shows the average precipitation (including snowfall) in each month of the year in Williston, North Dakota. It is based on NOAA data for the years 1991–2020.

Average temperature by month

What's the Rainiest Month in Williston?

In Williston, June has the greatest precipitation of any month. On average, Williston gets 2.8 inches of precipitation in June.

June is also the month where rain is most common. 38.5% of days in June will have at least some rain.

What's the Driest Month in Williston?

In Williston, February has the least precipitation of any month. On average, Williston gets 0.33 inches of precipitation in February.

February is also the month where rain is least common. 13.8% of days in February will have measurable rain or snow.

Month	Precipitation	% Chance
January	0.40 in	19.0
February	0.33 in	13.8
March	0.47 in	15.7
April	1.07 in	24.0
May	2.15 in	31.0
June	2.83 in	38.5
July	2.62 in	30.0
August	1.67 in	25.2
September	1.36 in	22.9
October	0.96 in	20.8
November	0.52 in	16.6
December	0.37 in	19.6
Year	14.67 in	23.1

Weather Station Details

Years	Station	Coordinates
1957–2024	Williston Experimental Farm	location
1894–1956	Sloulin Field International Airport	location