Lowest Daily High Temperatures in Cornwall History

This is a list of the coldest daily high temperatures ever recorded in Cornwall, Ontario history from 1867–2024 based on data from the NOAA.

Lowest temperatures all-time

Record for the lowest daily high temperature in Cornwall

The lowest high temperature for a calendar day in Cornwall, Ontario history was -29.0 °C which happened on Saturday, January 3, 1981.

Rank	Temperature	Date
1	-29.0 °C	January 3, 1981
2	-27.8 °C	January 15, 1957
3	-27.2 °C	January 8, 1968
4	-26.0 °C	January 15, 1994
5	-25.0 °C	February 3, 2023
6	-24.5 °C	January 26, 1994
7	-24.0 °C	February 13, 2016
8	-23.9 °C	February 12, 1967
8	-23.9 °C	January 30, 1951
8	-23.9 °C	February 5, 1886
8	-23.9 °C	February 4, 1886
8	-23.9 °C	January 24, 1882
13	-23.3 °C	January 23, 1976
13	-23.3 °C	January 9, 1968
13	-23.3 °C	January 12, 1886
13	-23.3 °C	January 26, 1871
17	-23.0 °C	January 21, 2005
17	-23.0 °C	January 17, 1982
19	-22.8 °C	December 20, 1884
19	-22.8 °C	January 7, 1878