Most Daily Precipitation in Helena History

This is a list of the largest daily precipitation totals ever recorded in Helena, Montana history from 1893–2024.

What's the Most It Has Ever Rained in Helena?

According to NOAA records, the most rain that Helena, Montana has ever received in a single day is 2.2 inches which occurred on Friday June 11, 1915.

Also see most rain in: 2 days | 1 week | 1 month

Helena Most Rain in One Day

Rank	Precipitation	Date
1	2.2 inches	June 11, 1915
2	2.1 inches	May 3, 1964
3	2.0 inches	May 12, 1900
4	1.9 inches	June 5, 1908
5	1.9 inches	May 21, 1981
6	1.9 inches	August 20, 1933
7	1.8 inches	August 21, 1983
7	1.8 inches	June 23, 1907
9	1.8 inches	May 20, 1957
10	1.8 inches	June 18, 1979
11	1.7 inches	June 4, 1908
12	1.7 inches	May 20, 1902
13	1.6 inches	September 30, 1893
14	1.6 inches	September 11, 1980
15	1.6 inches	September 3, 1901
16	1.6 inches	May 24, 1953
17	1.6 inches	June 28, 1982
17	1.6 inches	June 9, 1947
19	1.5 inches	September 3, 1911
20	1.5 inches	May 29, 1927
20	1.5 inches	May 13, 1898