Markham Climate by Month
Markham, Ontario, Canada
Warm summers and freezing winters, with rain spread through the year.
The climate in Markham is one of warm summers and freezing winters, with rain spread through the year. July is the warmest month, with highs around 80°F (27°C); January is the coolest at 29°F (-2°C), and nights dip to 15°F (-9°C). It gets 34 in (866 mm) of rain a year, spread across the months. The air is humid, averaging 78% relative humidity.
- Warmest month
- 80°F(27°C)
- Average high, July
- Coldest nights
- 15°F(-9°C)
- Average low, January
- Rain per year
- 34 in(866 mm)
- No clear rainy season
- Humidity
- 78%
- Sunniest: July
Best and worst months in Markham
Best for weatherJune is the best time for weather in Markham: highs near 74°F (24°C) and about 3.2 in (81 mm) of rain a month.
Least pleasantJanuary and February are the least pleasant; January is the coldest, with highs of only 29°F (-2°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in June.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Markham weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 29°F(-2°C) | 15°F(-9°C) | 2.2 in(57 mm) | 99% | 1.4 |
| FebFebruary | 30°F(-1°C) | 16°F(-9°C) | 2.2 in(56 mm) | 94% | 2.3 |
| MarMarch | 39°F(4°C) | 25°F(-4°C) | 2.0 in(51 mm) | 65% | 3.4 |
| AprApril | 52°F(11°C) | 35°F(2°C) | 3.2 in(82 mm) | 62% | 4.4 |
| MayMay | 65°F(18°C) | 47°F(8°C) | 3.2 in(82 mm) | 66% | 5.4 |
| JunJuneBest | 74°F(24°C) | 56°F(13°C) | 3.2 in(81 mm) | 70% | 5.8 |
| JulJuly | 80°F(27°C) | 62°F(16°C) | 2.9 in(74 mm) | 70% | 5.9 |
| AugAugust | 78°F(26°C) | 60°F(16°C) | 3.3 in(83 mm) | 74% | 5.2 |
| SepSeptember | 71°F(22°C) | 54°F(12°C) | 3.1 in(79 mm) | 78% | 4.0 |
| OctOctober | 58°F(14°C) | 42°F(6°C) | 3.0 in(77 mm) | 81% | 2.3 |
| NovNovember | 45°F(7°C) | 33°F(0°C) | 3.1 in(80 mm) | 87% | 1.4 |
| DecDecember | 35°F(1°C) | 23°F(-5°C) | 2.5 in(64 mm) | 93% | 1.1 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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