Earliest and Latest Days of 25° C in St. Catharines

This is a list of the earliest and latest days in the year with a high temperature of at least 25 °C in St. Catharines, Ontario history. It is based on NOAA data from the years 1882–2024.

Also see:

Earliest 25 degree day in St. Catharines?

The earliest in the year that St. Catharines, Ontario had a high temperature of at least 25 °C is March 22 which happened in 1938.

Latest 25 degree day in St. Catharines?

The latest in the year that St. Catharines, Ontario had a high temperature of at least 25 °C is November 5 which happened in 2022.

Earliest Days ≥ 25 °C

Date	Year	Temperature
March 22	1938	25.0 °C
March 26	1945	26.7 °C
March 28	1946	25.0 °C
March 28	1945	26.1 °C
April 5	1921	27.2 °C
April 6	1928	25.0 °C
April 6	1921	27.2 °C
April 7	1991	26.0 °C
April 7	1929	25.0 °C
April 8	1991	26.0 °C
April 8	1921	25.6 °C
April 10	1945	27.2 °C
April 11	1977	26.0 °C
April 11	1945	28.3 °C
April 12	2001	25.2 °C
April 12	1977	27.0 °C
April 12	1945	26.7 °C
April 13	1977	25.5 °C
April 13	1968	26.1 °C
April 13	1945	26.1 °C

Latest Days ≥ 25 °C

Date	Year	Temperature
November 5	2022	26.4 °C
November 1	1950	25.0 °C
October 27	1947	26.7 °C
October 24	1991	25.0 °C
October 24	1920	25.6 °C
October 23	2020	25.4 °C
October 22	2017	25.2 °C
October 22	1979	25.0 °C
October 22	1947	26.1 °C
October 21	1920	27.2 °C
October 20	1965	26.1 °C
October 18	1951	25.6 °C
October 18	1947	25.0 °C
October 17	1990	25.0 °C
October 17	1968	26.1 °C
October 17	1956	26.1 °C
October 17	1951	26.1 °C
October 17	1947	27.8 °C
October 17	1938	29.4 °C
October 16	1989	25.0 °C
October 16	1968	25.6 °C
October 16	1956	25.6 °C
October 16	1951	25.0 °C
October 16	1947	27.2 °C