Thunder Bay in May
6.4out of 10
Possible, with caveats
Cool: highs only around 14°C. Frequent rain: about 10 rainy days.
14°CAvg high
4°CAvg low
10Rainy days (66 mm)
15:00 hDaylight
06:23Sunrise · 21:23 Sunset
Why this score
- Cool: highs only around 14°C
- Frequent rain: about 10 rainy days
What to wear and pack
- A warm jacket
- Rain jacket or compact umbrella
How reliable is the forecast?
Rainfall in May is fairly consistent from year to year (2.4 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 May?
Daytime highs average 14°C and nights about 4°C.
When is the best time to visit Thunder Bay?
The best months are August, July.