Mont-Saint-Hilaire Weather in September
What's the weather like in Mont-Saint-Hilaire (Quebec) in September 2025?
The climate in Mont-Saint-Hilaire during September can be summarized as mild and a little damp.
September is in the fall / autumn in Mont-Saint-Hilaire and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 20°C (67°F), whilst at night 9°C (48°F) is normal.
| Daytime temperature | 19.6°C 67.3°F |
|---|---|
| Nightly temperature | 9°C 48.2°F |
| Average temperature | 14.3°C 57.7°F |
| Daily sunshine | 6 hrs |
| Avg rainfall | 92 mm 3.6 ins |
| Rainy days | 11 days |
| Sea temperature | 15.1°C 59.2°F |
| Humidity | 76% |
| Windspeed | 11.9kph 7 mph |
On average September is the 5th wettest month of the year in Mont-Saint-Hilaire with around 92mm 3.6 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.
On the flip side this corresponds to an average of 6 hours of sunshine per day.
September temperatures in Mont-Saint-Hilaire
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Mont-Saint-Hilaire in September 2025.
Other monthly averages
Best places to visit in September
Mont-Saint-Hilaire weather stats
| Hottest month: | July | 26°C 78.8°F |
|---|---|---|
| Driest month: | February | 64mm 2.5ins |
| Sunniest month: | July | 8.8hrs |
| Coldest month: | January | -5.8°C 21.6°F |
| Wettest month: | August | 101mm 4ins |
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