Weather & Climate
Thunder Bay District, Ontario, Canada
Overview
Available climate summaries for Thunder Bay District. Origins and reference periods are unverified; stored values may include AI estimates. Treat these as estimates until independently verified.
Key Metrics
Annual Avg
2.1°C
Summer Avg
18.1°C
Winter Avg
-15.7°C
Record High
33.6°C
Record Low
-46°C
Annual Precipitation
753.6 mm
Avg Humidity
81%
Summer Humidity
69%
Winter Humidity
95%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 1.6° | -17.6° | -46° | 35.6 | 95% | 36 | 44.1 |
| Feb | 1.2° | -15.7° | -40.8° | 26.6 | 95% | 63 | 46.5 |
| Mar | 18° | -7.2° | -36.2° | 34.4 | 90% | 109 | 47.7 |
| Apr | 20.8° | 2.1° | -22.4° | 54 | 75% | 141 | 53.9 |
| May | 26.6° | 9.8° | -5° | 86.8 | 71% | 164 | 54.5 |
| Jun | 30.4° | 16.1° | 3° | 99.6 | 70% | 172 | 52.7 |
| Jul | 33.6° | 19.5° | 6.4° | 89.3 | 69% | 177 | 44.1 |
| Aug | 32.7° | 18.7° | 5.8° | 67.6 | 69% | 150 | 50.4 |
| Sep | 29.6° | 13.3° | -1° | 92.1 | 75% | 101 | 54.4 |
| Oct | 22° | 4.7° | -14.4° | 77.5 | 81% | 61 | 49.5 |
| Nov | 15.2° | -4.3° | -28.3° | 50.1 | 88% | 31 | 50.1 |
| Dec | 3.5° | -13.8° | -45.2° | 40 | 95% | 26 | 43.3 |
Data sources
Estimates and unverified origins
Oyster List climate data - Climate origins are unverified. Available methods include historical APIs and AI estimates; stored rows do not identify the original dataset, reference period, or model for each value. Treat these summaries as estimates until independently verified. Record updated 2026-03-22.