Chatham, Canada Climate by Month
Chatham, Ontario, Canada
Warm summers and freezing winters, with rain spread through the year.
The climate in Chatham is one of warm summers and freezing winters, with rain spread through the year. July is the warmest month, with highs around 82°F (28°C); January is the coolest at 31°F (-1°C), and nights dip to 18°F (-8°C). It gets 35 in (879 mm) of rain a year, spread across the months.
- Warmest month
- 82°F(28°C)
- Average high, July
- Coldest nights
- 18°F(-8°C)
- Average low, February
- Rain per year
- 35 in(879 mm)
- No clear rainy season
- Humidity
- 75%
- Sunniest: July
Best and worst months in Chatham
Best for weatherThe most comfortable weather comes in June and September, with highs around 76°F (24°C) and about 3.2 in (83 mm) of rain a month.
Least pleasantJanuary and February are the least pleasant; January is the coldest, with highs of only 31°F (-1°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 September.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Chatham weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 31°F(-1°C) | 19°F(-7°C) | 2.5 in(64 mm) | 88% | 1.4 |
| FebFebruary | 33°F(0°C) | 18°F(-8°C) | 2.3 in(58 mm) | 86% | 2.3 |
| MarMarch | 42°F(6°C) | 27°F(-3°C) | 2.2 in(56 mm) | 74% | 3.5 |
| AprApril | 54°F(12°C) | 37°F(3°C) | 3.1 in(79 mm) | 68% | 4.4 |
| MayMay | 67°F(20°C) | 48°F(9°C) | 3.3 in(84 mm) | 68% | 5.2 |
| JunJuneBest | 77°F(25°C) | 58°F(15°C) | 3.3 in(84 mm) | 69% | 5.9 |
| JulJuly | 82°F(28°C) | 63°F(17°C) | 3.4 in(86 mm) | 70% | 5.9 |
| AugAugust | 81°F(27°C) | 62°F(17°C) | 3.0 in(76 mm) | 73% | 5.1 |
| SepSeptemberBest | 75°F(24°C) | 56°F(13°C) | 3.2 in(81 mm) | 71% | 4.2 |
| OctOctober | 62°F(17°C) | 45°F(7°C) | 3.0 in(76 mm) | 72% | 2.6 |
| NovNovember | 48°F(9°C) | 35°F(2°C) | 2.8 in(70 mm) | 79% | 1.6 |
| DecDecember | 37°F(3°C) | 26°F(-3°C) | 2.6 in(65 mm) | 83% | 1.2 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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