Most Daily Precipitation in St. Catharines History

This is a list of the largest daily precipitation totals ever recorded in St. Catharines, Ontario history from 1882–2024.

What's the Most It Has Ever Rained in St. Catharines?

According to NOAA records, the most rain that St. Catharines, Ontario has ever received in a single day is 7.7 cm which occurred on Monday September 29, 1924.

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

St. Catharines Most Rain in One Day

Rank	Precipitation	Date
1	7.7 cm	September 29, 1924
2	7.1 cm	June 25, 1968
3	7.0 cm	June 11, 1922
4	6.9 cm	August 10, 1938
5	6.7 cm	June 11, 1970
6	6.5 cm	June 9, 1966
7	6.3 cm	August 31, 2005
8	6.3 cm	September 29, 1999
9	6.2 cm	September 18, 1945
10	6.1 cm	August 9, 1952
11	6.1 cm	October 9, 2017
12	6.1 cm	October 5, 2001
13	6.1 cm	July 24, 1920
14	6.0 cm	October 15, 1954
15	5.9 cm	March 26, 2007
16	5.9 cm	November 2, 1999
17	5.8 cm	February 16, 1954
18	5.7 cm	June 9, 2004
19	5.7 cm	August 29, 1954
20	5.6 cm	July 12, 1964