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Weather & Climate
Mattawa, Ontario, Canada
Overview
Climate data and monthly weather averages for Mattawa.
Key Metrics
Annual Avg
3.9°C
Summer Avg
17.5°C
Winter Avg
-11°C
Record High
32.9°C
Record Low
-43.2°C
Annual Precipitation
864.1 mm
Avg Humidity
84%
Summer Humidity
78%
Winter Humidity
95%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 6.9° | -12.8° | -42.8° | 52.7 | 95% | 40 | 31.2 |
| Feb | 5.2° | -12° | -37.4° | 47.9 | 95% | 62 | 31.6 |
| Mar | 25.2° | -5.8° | -36.8° | 53.3 | 89% | 112 | 33.8 |
| Apr | 25.9° | 2.9° | -18.1° | 70.2 | 78% | 135 | 29.5 |
| May | 30.6° | 10.6° | -5.8° | 78.4 | 76% | 164 | 24.5 |
| Jun | 31.3° | 16° | -0.3° | 90.6 | 78% | 175 | 21.6 |
| Jul | 32.9° | 18.7° | 5.8° | 90.8 | 78% | 178 | 19.5 |
| Aug | 30.5° | 17.8° | 4.1° | 82.1 | 78% | 151 | 17.6 |
| Sep | 31.3° | 13.9° | -2.7° | 80.4 | 78% | 110 | 22.6 |
| Oct | 25.3° | 6.4° | -7.5° | 86.8 | 82% | 68 | 23.4 |
| Nov | 20° | -0.5° | -19.6° | 71.1 | 86% | 38 | 28.8 |
| Dec | 11.6° | -8.3° | -43.2° | 59.8 | 94% | 30 | 30.3 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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