Lowest Daily High Temperatures in London History

This is a list of the coldest daily high temperatures ever recorded in London, Ontario history from 1883–2024 based on data from the NOAA.

Lowest temperatures all-time

Record for the lowest daily high temperature in London

The lowest high temperature for a calendar day in London, Ontario history was -23.3 °C which has happened twice, most recently on Thursday February 8, 1934.

Rank	Temperature	Date
1	-23.3 °C	February 8, 1934
1	-23.3 °C	February 11, 1899
3	-20.6 °C	February 9, 1933
3	-20.6 °C	February 17, 1896
5	-20.3 °C	January 19, 1994
6	-20.0 °C	February 9, 1899
7	-19.4 °C	January 15, 1972
7	-19.4 °C	February 6, 1895
9	-18.9 °C	February 9, 1934
9	-18.9 °C	February 10, 1899
9	-18.9 °C	February 11, 1885
9	-18.9 °C	January 4, 1884
13	-18.8 °C	February 15, 2015
14	-18.5 °C	January 18, 1994
14	-18.5 °C	January 17, 1982
16	-18.3 °C	February 18, 1936
16	-18.3 °C	February 4, 1886
18	-18.2 °C	February 17, 1979
19	-17.8 °C	January 7, 2014
19	-17.8 °C	January 10, 1982
19	-17.8 °C	February 12, 1899