Earliest and Latest Days of 35° C in London

This is a list of the earliest and latest days in the year with a high temperature of at least 35 °C in London, Ontario history. It is based on NOAA data from the years 1883–2024.

Also see:

Earliest 35 degree day in London?

The earliest in the year that London, Ontario had a high temperature of at least 35 °C is June 2 which happened in 1919.

Latest 35 degree day in London?

The latest in the year that London, Ontario had a high temperature of at least 35 °C is September 12 which happened in 1931.

Earliest Days ≥ 35 °C

Date	Year	Temperature
June 2	1919	35.6 °C
June 5	1925	36.7 °C
June 6	1925	37.2 °C
June 20	1923	35.0 °C
June 21	1923	35.0 °C
June 23	1923	36.1 °C
June 23	1894	35.0 °C
June 24	1952	35.6 °C
June 24	1923	36.7 °C
June 24	1922	35.0 °C
June 25	1988	38.2 °C
June 25	1952	36.1 °C
June 28	1971	36.1 °C
June 28	1944	35.0 °C
June 29	1927	35.0 °C
June 30	1931	35.6 °C
June 30	1927	35.6 °C
July 1	1931	37.2 °C
July 1	1927	36.1 °C
July 1	1911	36.7 °C
July 1	1901	36.7 °C
July 1	1894	35.0 °C

Latest Days ≥ 35 °C

Date	Year	Temperature
September 12	1931	35.0 °C
September 8	1933	35.6 °C
August 30	1953	35.0 °C
August 25	1948	35.0 °C
August 22	1916	35.6 °C
August 21	1916	37.2 °C
August 20	1916	36.1 °C
August 19	1899	35.0 °C
August 16	1922	35.0 °C
August 13	1918	37.2 °C
August 10	1944	35.0 °C
August 10	1911	35.0 °C
August 10	1900	35.0 °C
August 9	1914	35.0 °C
August 8	2001	37.0 °C
August 8	1918	36.1 °C
August 7	1918	39.4 °C
August 7	1916	36.1 °C
August 7	1900	35.0 °C
August 6	1931	35.6 °C
August 6	1918	41.1 °C
August 6	1916	35.0 °C
August 6	1900	35.0 °C