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Thunder Bay weather essentials
Month
High
Low
Precip
Feb
20°F -6°C
0°F -17°C
2 in 4 cm
Mar
30°F -1°C
9°F -12°C
3 in 6 cm
Apr
46°F 7°C
24°F -4°C
3 in 7 cm
May
56°F 13°C
34°F 1°C
3 in 9 cm
Jun
67°F 19°C
44°F 6°C
3 in 8 cm
Jul
72°F 22°C
50°F 10°C
3 in 7 cm
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