Most Monthly Precipitation in Rapid City History

This is a list of the largest monthly precipitation totals ever recorded in Rapid City, South Dakota history from 1948–2024.
What Was the Wettest Month in Rapid City History?
According to NOAA records, the most precipitation that Rapid City, South Dakota has ever received in a single month is 8.2 inches which occurred in May 1996.
Month to date though March 25, 2024: 0.2 inches
Rapid City Most Rain in One Month
Rank Precipitation Month
1 8.2 inches May 1996
2 7.8 inches May 2019
3 7.2 inches May 2008
4 7.1 inches June 2015
5 7.1 inches May 1957
6 7.0 inches June 1968
7 7.0 inches May 1965
8 6.9 inches May 1962
9 6.9 inches May 2015
10 6.8 inches June 1967
11 6.5 inches May 1982
12 6.4 inches July 2019
13 6.1 inches July 1969
14 6.1 inches June 2018
15 6.0 inches July 2018
16 5.9 inches May 2011
17 5.7 inches May 2023
18 5.6 inches June 1975
19 5.6 inches October 1998
20 5.6 inches June 1998