Most Monthly Precipitation in Sioux Lookout History

This is a list of the largest monthly precipitation totals ever recorded in Sioux Lookout, Ontario history from 1914–2024.

What Was the Wettest Month in Sioux Lookout History?

According to NOAA records, the most precipitation that Sioux Lookout, Ontario has ever received in a single month is 33.8 cm which occurred in September 1941.

Month to date though April 26, 2024: 0.4 cm

Sioux Lookout Most Rain in One Month

Rank	Precipitation	Month
1	33.8 cm	September 1941
2	22.3 cm	September 1991
3	21.8 cm	June 2005
4	20.3 cm	September 1999
5	20.2 cm	June 2014
6	19.9 cm	June 2000
7	19.3 cm	August 1962
8	19.0 cm	June 2002
9	18.9 cm	July 2010
10	18.8 cm	August 2000
11	18.6 cm	July 2008
12	18.5 cm	September 1943
13	18.4 cm	September 2019
14	18.0 cm	July 1923
15	17.6 cm	June 2001
16	17.5 cm	July 2015
17	17.2 cm	June 1999
18	17.1 cm	May 2007
19	16.9 cm	June 1934
20	16.8 cm	September 1915