Thunder Bay in August
7.9out of 10
Yes, a good time to go
Warm and comfortable: highs around 22°C. Frequent rain: about 9 rainy days.
22°CAvg high
14°CAvg low
9Rainy days (67 mm)
14:08 hDaylight
06:57Sunrise · 21:05 Sunset
Why this score
- Warm and comfortable: highs around 22°C
- Frequent rain: about 9 rainy days
What to wear and pack
- T-shirts and light layers
- A light jacket for cooler evenings
- Rain jacket or compact umbrella
How reliable is the forecast?
Rainfall in August is fairly consistent from year to year (2.7 days). Averages cover 30 years (1991–2020). Individual days can differ a lot.
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
How hot is Thunder Bay in August?
Daytime highs average 22°C and nights about 14°C.
When is the best time to visit Thunder Bay?
The best months are August, July.