Weather in Thunder Bay: October
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Average day temperature: | 49.4°F |
| Average night temperature: | 42.7°F | |
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Sea water temperature: | 53.5°F |
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Number of sunny days: | 10 days |
| Day length: | 9.9 - 11.6 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.6 in. | |
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forecast
| Thunder Bay |
temperature
| Thunder Bay |
Air temperature in October, °F
The highest day temperature during October of 2025 was 80°F. At the same time the lowest night temperature was 30°F. Daily and nightly averages during October were 55.3°F and 43.5°F.
Sea water temperature in Thunder Bay in October, °F
The average sea water temperature in October of 2025 was 54.5°F. The highest and lowest sea temperatures during the month were 59.4°F and 49.6°F.
Number of sunny, partly cloudy and cloudy days in October is almost equal.
Precipitation total in October, in.
Precipitation total value in Thunder Bay in October is 0.6 in. Other months of the year show relatively similar values.
The average wind speed value in October is 8.3 mph
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in October is: 5.8.
Best time for vacation in Thunder Bay
Thunder Bay on a weather map
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