Châteauguay Climate by Month
Châteauguay, Quebec, Canada
Warm summers and freezing winters, with rain spread through the year.
Châteauguay has warm summers and freezing winters, with rain spread through the year. July is the warmest month, with highs around 78°F (26°C); January is the coolest at 23°F (-5°C), and nights dip to 8°F (-13°C). It gets 39 in (990 mm) of rain a year, spread across the months. The air is humid, averaging 78% relative humidity.
- Warmest month
- 78°F(26°C)
- Average high, July
- Coldest nights
- 8°F(-13°C)
- Average low, January
- Rain per year
- 39 in(990 mm)
- No clear rainy season
- Humidity
- 78%
- Sunniest: June
Best and worst months in Châteauguay
Best for weatherThe most comfortable weather comes from June to August, with highs around 76°F (25°C) and about 3.6 in (92 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 23°F (-5°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 August.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Châteauguay weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 23°F(-5°C) | 8°F(-13°C) | 2.8 in(72 mm) | 98% | 1.4 |
| FebFebruary | 26°F(-3°C) | 9°F(-13°C) | 2.3 in(59 mm) | 89% | 2.3 |
| MarMarch | 35°F(2°C) | 20°F(-7°C) | 2.7 in(69 mm) | 78% | 3.4 |
| AprApril | 50°F(10°C) | 34°F(1°C) | 3.3 in(85 mm) | 66% | 4.5 |
| MayMay | 65°F(18°C) | 46°F(8°C) | 3.3 in(83 mm) | 67% | 5.2 |
| JunJuneBest | 73°F(23°C) | 55°F(13°C) | 3.6 in(92 mm) | 74% | 5.7 |
| JulJulyBest | 78°F(26°C) | 60°F(16°C) | 3.6 in(91 mm) | 73% | 5.7 |
| AugAugustBest | 77°F(25°C) | 59°F(15°C) | 3.7 in(94 mm) | 72% | 5.0 |
| SepSeptember | 70°F(21°C) | 52°F(11°C) | 3.2 in(81 mm) | 77% | 3.9 |
| OctOctober | 56°F(13°C) | 41°F(5°C) | 3.8 in(96 mm) | 77% | 2.3 |
| NovNovember | 44°F(6°C) | 30°F(-1°C) | 3.3 in(83 mm) | 81% | 1.4 |
| DecDecember | 31°F(0°C) | 18°F(-8°C) | 3.3 in(85 mm) | 89% | 1.1 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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