Climate normals · 1970–2000
Thunder Bay Climate
Thunder Bay is a city in Canada (08) with a population of about 108,843. Its average annual temperature is 3.2°C (38°F), with roughly 717 mm of rain per year.
3.2°C
Avg Temp
717
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
Thunder Bay Climate
Thunder Bay has an average annual temperature of 3.2°C (38°F) and receives about 717 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
3.2°C
Avg Temp
717
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -14° / 6° | 35 mm |
| February | -12° / 10° | 26 mm |
| March | -5° / 22° | 40 mm |
| April | 3° / 37° | 45 mm |
| May | 10° / 50° | 70 mm |
| June | 15° / 60° | 82 mm |
| July | 19° / 65° | 89 mm |
| August | 18° / 64° | 84 mm |
| September | 12° / 54° | 84 mm |
| October | 6° / 43° | 67 mm |
| November | -2° / 28° | 56 mm |
| December | -10° / 13° | 39 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Thunder Bay
The most comfortable months to visit Thunder Bay are typically July, August and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 25°C high). The coldest is January (near -20°C low). July is usually the wettest month.
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Frequently Asked Questions
The most comfortable months to visit Thunder Bay are typically July, August and June, when temperatures are mildest and rainfall is relatively low (1970–2000 climate normals).
Thunder Bay, Canada has an average annual temperature of 3.2°C and about 717 mm of precipitation per year. The warmest month is July and the coldest is January.
In July, the hottest month, daily highs in Thunder Bay average about 25°C (77°F).
Monthly climate normals (1970–2000) sampled from WorldClim 2.1 at ~9 km resolution. Humidity derived from vapor pressure. City coordinates and population from GeoNames.