Most Daily Precipitation in Casper History

This is a list of the largest daily precipitation totals ever recorded in Casper, Wyoming history from 1900–2023.

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

According to NOAA records, the most rain that Casper, Wyoming has ever received in a single day is 2.7 inches which occurred on Friday September 28, 1923.

Also see most rain over a two-day period.

Rank	Precipitation	Date
1	2.7 inches	September 28, 1923
2	2.6 inches	July 25, 1901
3	2.2 inches	May 17, 2000
4	2.2 inches	August 2, 2007
5	2.2 inches	May 5, 2007
6	2.2 inches	June 19, 1986
7	2.1 inches	June 14, 1982
8	2.1 inches	June 16, 2003
9	2.1 inches	May 22, 1952
10	2.1 inches	October 16, 1998
11	2.0 inches	September 20, 1989
12	2.0 inches	May 17, 1978
13	2.0 inches	July 5, 1926
14	1.9 inches	October 6, 1962
15	1.8 inches	April 20, 1974
16	1.8 inches	July 22, 1983
17	1.8 inches	September 20, 1950
18	1.8 inches	April 6, 1922
19	1.7 inches	May 5, 1993
20	1.7 inches	May 8, 1995