Best Time to Visit Thunder Bay: Month-by-Month Guide
Best months for Thunder Bay: August, July.
- Best months for Thunder Bay: August, July.
- Peak season is July, August, June. Expect higher prices and more visitors (estimated from the climate, not from visitor counts).
- Shoulder season: September. Good weather without the busiest period.
- Wettest months: July, October, June.
- The least pleasant month is December (score 4.1).
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -9°C | -18°C | 29 mm | 6 | – | – | 4.2 |
| February | -7°C | -16°C | 22 mm | 5 | – | – | 4.4 |
| March | 0°C | -10°C | 31 mm | 7 | – | – | 4.2 |
| April | 6°C | -3°C | 54 mm | 8 | – | – | 5.1 |
| May | 14°C | 4°C | 66 mm | 10 | – | – | 6.4 |
| June | 19°C | 10°C | 65 mm | 10 | – | – | 7.3 |
| July | 23°C | 14°C | 76 mm | 11 | – | – | 7.7 |
| August | 22°C | 14°C | 67 mm | 9 | – | – | 7.9 |
| September | 17°C | 9°C | 84 mm | 10 | – | – | 7.0 |
| October | 9°C | 3°C | 73 mm | 11 | – | – | 5.6 |
| November | 2°C | -4°C | 49 mm | 8 | – | – | 4.3 |
| December | -5°C | -13°C | 38 mm | 8 | – | – | 4.1 |
Frequently asked questions
When is the best time to visit Thunder Bay?
The best months are August, July.
When is the rainy season in Thunder Bay?
The wettest months are July, October, June.