Watertown Average Rainfall by Month

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

Average temperature by month

What's the Rainiest Month in Watertown?

In Watertown, June has the greatest precipitation of any month. On average, Watertown gets 3.9 inches of precipitation in June.

June is also the month where rain is most common. 37.9% of days in June will have at least some rain.

What's the Driest Month in Watertown?

In Watertown, January has the least precipitation of any month. On average, Watertown gets 0.53 inches of precipitation in January.

November is the month with the lowest chance of precipitation. 18.1% of days in November will have measurable rain or snow.

Month	Precipitation	% Chance
January	0.53 in	19.0
February	0.61 in	21.1
March	1.00 in	22.2
April	2.10 in	29.5
May	2.83 in	36.8
June	3.93 in	37.9
July	2.95 in	30.6
August	2.93 in	27.8
September	2.45 in	28.2
October	1.87 in	24.1
November	0.68 in	18.1
December	0.67 in	20.4
Year	22.74 in	26.4

Weather Station Details

Years	Station	Coordinates
1893–2024	Watertown Regional Airport	location