Summit Average Rainfall by Month

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

Average temperature by month

What's the Rainiest Month in Summit?

In Summit, July has the greatest precipitation of any month. On average, Summit gets 4.1 inches of precipitation in July.

However, June is the month with the greatest chance of precipitation. 37.5% of days in June will have at least some rain.

What's the Driest Month in Summit?

In Summit, January has the least precipitation of any month. On average, Summit gets 0.63 inches of precipitation in January.

November is the month with the lowest chance of precipitation. 17.1% of days in November will have measurable rain or snow.

Month	Precipitation	% Chance
January	0.63 in	20.8
February	0.65 in	20.5
March	0.99 in	19.0
April	2.06 in	25.1
May	3.12 in	34.4
June	3.92 in	37.5
July	4.07 in	29.4
August	2.97 in	27.4
September	2.74 in	27.3
October	2.51 in	25.2
November	0.86 in	17.1
December	0.64 in	21.6
Year	25.13 in	25.4

Weather Station Details

Years	Station	Coordinates
1956–2024	Summit 1 W	location