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Weather & Climate
Markham, Ontario, Canada
Overview
Climate data and monthly weather averages for Markham.
Key Metrics
Annual Avg
7.7°C
Summer Avg
20.6°C
Winter Avg
-5.1°C
Record High
35.8°C
Record Low
-29.3°C
Annual Precipitation
721.7 mm
Avg Humidity
79%
Summer Humidity
68%
Winter Humidity
90%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 11.9° | -6.4° | -26.9° | 51.8 | 91% | 44 | 61.1 |
| Feb | 13.3° | -6.2° | -29.3° | 46.2 | 89% | 60 | 68.6 |
| Mar | 23.9° | -1.1° | -28.2° | 51.5 | 83% | 104 | 68.6 |
| Apr | 24.3° | 5.2° | -14.3° | 65.7 | 79% | 135 | 65.5 |
| May | 31.9° | 12.1° | -3.3° | 67.3 | 76% | 171 | 55.2 |
| Jun | 34.6° | 18.2° | 3.5° | 66 | 71% | 182 | 45.3 |
| Jul | 35.6° | 22.1° | 7.8° | 64.5 | 65% | 186 | 44.9 |
| Aug | 35.8° | 21.4° | 9.6° | 55.5 | 67% | 164 | 44.5 |
| Sep | 33.4° | 17.4° | 3.4° | 58.8 | 71% | 125 | 54.4 |
| Oct | 28.3° | 9.7° | -2.9° | 70.1 | 78% | 78 | 55.7 |
| Nov | 21.1° | 3.1° | -13.3° | 64.2 | 84% | 48 | 63.9 |
| Dec | 14° | -2.8° | -20.9° | 60.1 | 89% | 36 | 62.7 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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