Highest Daily Low Temperatures in St. Catharines History

This is a list of the hottest daily low temperatures ever recorded in St. Catharines, Ontario history from 1882–2024 based on data from the NOAA.

Highest temperatures all-time

Record for the highest daily low temperature in St. Catharines

The highest low temperature for a calendar day in St. Catharines, Ontario history was 26.5 °C which has happened twice, most recently on Tuesday July 6, 1993.

Rank	Temperature	Date
1	26.5 °C	July 6, 1993
1	26.5 °C	August 14, 1988
3	26.0 °C	August 5, 1988
3	26.0 °C	August 4, 1988
5	25.8 °C	July 18, 2013
6	25.6 °C	August 28, 2018
6	25.6 °C	July 15, 1970
6	25.6 °C	August 1, 1955
9	25.4 °C	July 21, 2011
10	25.3 °C	August 9, 2001
11	25.0 °C	July 20, 1991
11	25.0 °C	August 13, 1988
11	25.0 °C	August 9, 1973
11	25.0 °C	July 21, 1972
11	25.0 °C	July 28, 1949
11	25.0 °C	July 14, 1936
11	25.0 °C	July 28, 1921
18	24.9 °C	August 12, 2016
18	24.9 °C	July 17, 2012
20	24.8 °C	August 10, 2021