This page contains a list of the average yearly high and low temperatures in Thunder Bay, Ontario for each year between 1942 and 2023. It is based on NOAA data.
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What Was the Hottest Year Ever in Thunder Bay?
2012 was the warmest year in the history of Thunder Bay, Ontario. The average daily high temperature was 11.0 °C, and the average low was -1.1 °C.
What Was the Coldest Year Ever in Thunder Bay?
1950 was the coolest year in the history of Thunder Bay, Ontario. The average daily high temperature was 6.7 °C, and the average low was -5.7 °C.