Thunder Bay
Thunder Bay is a city in Ontario, Canada, close to the sea. It has a population of about 108,843 (2021). The climate is classified as warm-summer humid continental (Köppen Dfb), with warm summers, cold winters and precipitation in every season.
Best: Jul–Sep. Warmth, sunshine and dry days, month by month.
Thunder Bay at a glance
The months with the highest weather score
Average high in July
Average low in January
81 mm of rain
25 mm of rain
August
within 6.4 km
Weather in Thunder Bay
Now and the next ten days. The 14 and 30-day outlooks are one click away.
Partly cloudy · wind 9 km/h · humidity 90%
When to go to Thunder Bay
Each month's weather score (warmth, sun, dry days) with its temperatures and rain.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Score | 39 | 40 | 36 | 24 | 57 | 65 | 69 | 71 | 77 | 27 | 28 | 28 |
| High | -8° | -5° | 2° | 9° | 15° | 21° | 24° | 23° | 18° | 10° | 2° | -5° |
| Low | -19° | -17° | -11° | -3° | 3° | 8° | 12° | 15° | 11° | 0° | -7° | -14° |
| Rain (mm) | 36 | 25 | 32 | 51 | 66 | 81 | 79 | 70 | 71 | 69 | 55 | 38 |
| Wet days | 5 | 5 | 7 | 12 | 11 | 14 | 13 | 12 | 9 | 11 | 9 | 9 |
| Sea | 2° | 1° | 1° | 2° | 3° | 4° | 9° | 15° | 14° | 10° | 6° | 4° |
What's on in Thunder Bay
Concerts, football matches, the public holidays ahead and the town's festivals through the year.
Music venues
Monuments and museums in Thunder Bay
More museums: Alexander Henry Museum Ship · Northwestern Ontario Aviation Heritage Centre · Oliver Paipoonge Heritage Park
Outdoors around Thunder Bay
Hiking routes from the town, and what there is to do within 15 km: huts, viewpoints, climbing, camping, ski areas and dive sites.
Nature around Thunder Bay
Wildlife in October
The birds and mammals of Canada seen most this month, compared with the rest of their year.
The sky over Thunder Bay
Universities and research institutes
Towns and villages around Thunder Bay
Each with its own page: weather, climate and the best time to visit.
Thunder Bay from above
Postal code
Getting to Thunder Bay
Places near Thunder Bay
Places with a climate like Thunder Bay
Matched month by month on temperature, rain and sunshine.
