Earliest and Latest Days of 35° C in Cornwall

This is a list of the earliest and latest days in the year with a high temperature of at least 35 °C in Cornwall, Ontario history. It is based on NOAA data from the years 1867–2024.

Also see:

Earliest 35 degree day in Cornwall?

The earliest in the year that Cornwall, Ontario had a high temperature of at least 35 °C is May 26 which happened in 2010.

Latest 35 degree day in Cornwall?

The latest in the year that Cornwall, Ontario had a high temperature of at least 35 °C is August 31 which happened in 1881.

Earliest Days ≥ 35 °C

Date	Year	Temperature
May 26	2010	35.0 °C
May 27	2020	35.0 °C
May 31	1869	35.6 °C
June 18	1870	35.6 °C
June 22	2020	35.0 °C
June 27	1870	35.0 °C
June 30	1964	35.0 °C
July 1	2018	35.0 °C
July 1	1963	35.0 °C
July 2	2018	35.0 °C
July 2	1868	35.0 °C
July 4	2018	35.0 °C
July 4	1868	35.0 °C
July 5	2018	35.0 °C
July 7	2020	35.0 °C
July 9	2020	36.0 °C
July 10	2020	37.5 °C
July 10	1881	37.2 °C
July 12	1987	35.0 °C
July 13	1868	35.6 °C

Latest Days ≥ 35 °C

Date	Year	Temperature
August 31	1881	35.0 °C
August 19	1884	35.0 °C
August 14	2002	36.0 °C
August 9	2001	35.0 °C
August 9	1867	35.0 °C
August 8	2001	36.5 °C
August 6	1955	35.0 °C
August 5	1955	35.0 °C
August 4	2012	35.5 °C
August 3	1988	35.0 °C
August 2	1975	35.0 °C
August 2	1955	35.0 °C
August 1	1975	35.6 °C
August 1	1955	35.0 °C
July 25	1870	36.1 °C
July 23	1955	35.6 °C
July 22	1955	35.6 °C
July 21	2011	35.0 °C
July 21	1955	35.0 °C
July 16	2018	35.5 °C