Earliest and Latest Days of 35° C in St. Catharines

This is a list of the earliest and latest days in the year with a high temperature of at least 35 °C in St. Catharines, Ontario history. It is based on NOAA data from the years 1882–2024.

Also see:

Earliest 35 degree day in St. Catharines?

The earliest in the year that St. Catharines, Ontario had a high temperature of at least 35 °C is June 5 which happened in 1925.

Latest 35 degree day in St. Catharines?

The latest in the year that St. Catharines, Ontario had a high temperature of at least 35 °C is September 13 which happened in 1952.

Earliest Days ≥ 35 °C

Date	Year	Temperature
June 5	1925	35.0 °C
June 6	1925	35.6 °C
June 9	1933	35.6 °C
June 12	1978	35.0 °C
June 18	1994	36.0 °C
June 24	1923	35.0 °C
June 25	1988	35.0 °C
June 25	1943	35.0 °C
June 28	1933	36.1 °C
July 1	1913	35.0 °C
July 2	1966	35.6 °C
July 2	1931	35.0 °C
July 3	1949	37.2 °C
July 3	1921	35.0 °C
July 3	1919	35.6 °C
July 4	1990	35.0 °C
July 4	1955	35.0 °C
July 4	1949	35.6 °C
July 4	1921	35.0 °C
July 4	1919	35.0 °C

Latest Days ≥ 35 °C

Date	Year	Temperature
September 13	1952	36.1 °C
September 12	1931	35.0 °C
September 4	1953	35.0 °C
September 3	1953	36.7 °C
September 2	1953	35.6 °C
August 28	1948	36.7 °C
August 27	1993	36.0 °C
August 27	1953	35.0 °C
August 27	1948	38.3 °C
August 26	1948	37.8 °C
August 25	1948	36.7 °C
August 21	1955	35.0 °C
August 19	1955	35.0 °C
August 14	1944	35.0 °C
August 13	1947	35.0 °C
August 13	1918	35.0 °C
August 11	1944	35.6 °C
August 10	1949	35.0 °C
August 10	1944	35.0 °C
August 9	1949	36.7 °C