Saint John Weather in September
What's the weather like in Saint John (New Brunswick) in September 2024?
The climate in Saint John during September can be summarized as mild and damp.
September is in the fall / autumn in Saint John and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 18°C (64°F), whilst at night 10°C (49°F) is normal.
| Daytime temperature | 17.5°C 63.5°F |
|---|---|
| Nightly temperature | 9.5°C 49.1°F |
| Average temperature | 13.5°C 56.3°F |
| Daily sunshine | 6.3 hrs |
| Avg rainfall | 104 mm 4.1 ins |
| Rainy days | 11 days |
| Sea temperature | 13.7°C 56.7°F |
| Humidity | 80% |
| Windspeed | 13.3kph 8 mph |
On average September is the 6th driest month of the year in Saint John with around 104mm 4.1 inches of rain making it a 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 6.3 hours of sunshine per day.
September temperatures in Saint John
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 Saint John in September 2024.
Other monthly averages
Best places to visit in September
Saint John weather stats
| Hottest month: | August | 21.1°C 70°F |
|---|---|---|
| Driest month: | March | 95mm 3.7ins |
| Sunniest month: | August | 7.5hrs |
| Coldest month: | January | -2.3°C 27.9°F |
| Wettest month: | December | 145mm 5.7ins |
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