Farnham Weather in September
What's the weather like in Farnham (Quebec) in September 2025?
The climate in Farnham during September can be summarized as mild and a little damp.
September is in the fall / autumn in Farnham and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 20°C (68°F), whilst at night 9°C (48°F) is normal.
| Daytime temperature | 19.8°C 67.6°F |
|---|---|
| Nightly temperature | 9.1°C 48.3°F |
| Average temperature | 14.4°C 57.9°F |
| Daily sunshine | 6 hrs |
| Avg rainfall | 97 mm 3.8 ins |
| Rainy days | 12 days |
| Sea temperature | 14.8°C 58.6°F |
| Humidity | 77% |
| Windspeed | 11.9kph 7 mph |
On average September is the 6th wettest month of the year in Farnham with around 97mm 3.8 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 12 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 Farnham
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 Farnham in September 2025.
Other monthly averages
Best places to visit in September
Farnham weather stats
| Hottest month: | July | 25.7°C 78.3°F |
|---|---|---|
| Driest month: | February | 65mm 2.6ins |
| Sunniest month: | July | 9hrs |
| Coldest month: | January | -5.2°C 22.6°F |
| Wettest month: | August | 120mm 4.7ins |
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