Most Daily Precipitation in Boulder History

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

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

According to NOAA records, the most rain that Boulder, Colorado has ever received in a single day is 9.1 inches which occurred on Thursday September 12, 2013.

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

Boulder Most Rain in One Day

Rank	Precipitation	Date
1	9.1 inches	September 12, 2013
2	4.8 inches	July 31, 1919
3	3.6 inches	April 3, 1986
4	3.5 inches	May 17, 1995
5	3.4 inches	June 4, 1949
6	3.4 inches	May 7, 1969
7	3.3 inches	April 2, 1957
8	3.3 inches	April 15, 1921
9	3.2 inches	April 24, 1997
10	3.1 inches	June 9, 1987
11	3.1 inches	May 18, 2017
12	3.1 inches	August 3, 1951
13	3.1 inches	September 4, 1909
14	3.0 inches	July 23, 1929
15	2.9 inches	April 10, 1944
16	2.8 inches	May 17, 1983
17	2.7 inches	September 21, 1902
18	2.7 inches	March 24, 1909
19	2.7 inches	June 16, 1963
20	2.6 inches	May 9, 1957