Thunder Bay Climate & Weather

Thunder Bay Climate and Weather

Thunder Bay has a humid continental climate with hot summers and cold winters. The city's climate is largely influenced by Lake Superior, which results in cooler summers and warmer winters compared to other places in the region. The best time to visit Thunder Bay is from June to September, when temperatures are warmer; the average high temperature in the summer is around 73.4°F (23°C). The hottest month is July, while January is the coldest, when temperatures can reach as low as -2.2°F (-19°C). The winters can be bitterly cold for visitors not used to extreme temperatures.

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