Highest Temperatures in Thunder Bay History

This is a list of the 20 highest temperatures ever recorded in Thunder Bay, Ontario history from 1941–2024 based on data from the NOAA.

• Highest temperatures by year
• Lowest temperatures all-time
• Change city

Rank	Temperature	Date
1	40.3 °C	August 7, 1983
2	39.0 °C	June 18, 1995
3	37.2 °C	July 30, 1975
4	35.8 °C	July 7, 1988
5	35.7 °C	July 16, 2002
6	35.6 °C	June 12, 1956
6	35.6 °C	August 8, 1949
8	35.2 °C	August 7, 2001
8	35.2 °C	May 30, 1986
10	35.1 °C	July 6, 1988
11	35.0 °C	July 28, 1988
11	35.0 °C	July 13, 1974
11	35.0 °C	August 19, 1955
11	35.0 °C	July 20, 1955
11	35.0 °C	August 23, 1947
16	34.8 °C	June 6, 1988
16	34.8 °C	May 22, 1980
18	34.7 °C	July 15, 2006
19	34.6 °C	August 13, 1991
20	34.5 °C	June 5, 1988