Most Monthly Precipitation in Ottawa History

This is a list of the largest monthly precipitation totals ever recorded in Ottawa, Kansas history from 1895–2024.

What Was the Wettest Month in Ottawa History?

According to NOAA records, the most precipitation that Ottawa, Kansas has ever received in a single month is 18.3 inches which occurred in August 2019.

Ottawa Most Rain in One Month

Rank	Precipitation	Month
1	18.3 inches	August 2019
2	15.3 inches	May 2019
3	13.8 inches	July 1951
4	13.2 inches	September 1961
5	12.9 inches	June 1965
6	12.8 inches	June 1981
7	12.5 inches	June 1915
8	12.4 inches	May 2015
9	12.1 inches	September 1986
10	11.9 inches	May 1898
11	11.8 inches	July 1909
12	11.7 inches	May 1904
13	11.7 inches	May 1995
14	11.0 inches	June 1897
15	11.0 inches	September 1973
16	11.0 inches	October 1941
17	10.9 inches	June 1951
18	10.8 inches	August 1954
19	10.8 inches	November 1928
20	10.6 inches	June 1977