September weather forecastGrande-Vallée, Canada
September
Weather in September
September, the first month of the autumn in Grande-Vallée, is still a mild month, with an average temperature fluctuating between 9.5°C (49.1°F) and 15.6°C (60.1°F).Temperature
The beginning of September marks a decrease in the average high-temperature, transitioning from a pleasant 20.6°C (69.1°F) in August to a moderate 15.6°C (60.1°F). Grande-Vallée observes an average low-temperature of 9.5°C (49.1°F) during September nights.Humidity
In Grande-Vallée, the average relative humidity in September is 78%.Rainfall
In Grande-Vallée, in September, it is raining for 12.5 days, with typically 55mm (2.17") of accumulated precipitation. Throughout the year, there are 133.1 rainfall days, and 670mm (26.38") of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in Grande-Vallée is 12h and 35min.On the first day of September, sunrise is at 5:37 am and sunset at 7:02 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 6:00 pm EDT.
Sunshine
The average sunshine in September is 8.1h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 3 during September translates into the following guidance:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Grande-Vallée, Canada
- Average high temperature in September: 15.6°C
The warmest month (with the highest average high temperature) is August (20.6°C).
The month with the lowest average high temperature is January (-6.1°C).
- Average low temperature in September: 9.5°C
The month with the highest average low temperature is August (13.4°C).
The coldest month (with the lowest average low temperature) is February (-12.3°C).
Average pressure in September
Grande-Vallée, Canada
- Average pressure in September: 1014.8mbar
The month with the highest atmospheric pressure is September (1014.8mbar).
The month with the lowest atmospheric pressure is January (1010.3mbar).
Average wind speed in September
Grande-Vallée, Canada
- Average wind speed in September: 15.1km/h
The windiest month (with the highest average wind speed) is December (19.4km/h).
The calmest month (with the lowest average wind speed) is July (11.5km/h).
Average humidity in September
Grande-Vallée, Canada
- Average humidity in September: 78%
The month with the highest relative humidity is March (90%).
The month with the lowest relative humidity is June (76%).
Average rainfall in September
Grande-Vallée, Canada
- Average rainfall in September: 55mm
The wettest months (with the highest rainfall) are April, July and November (62mm).
The driest month (with the least rainfall) is February (38mm).
Average rainfall days in September
Grande-Vallée, Canada
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in September
Grande-Vallée, Canada
- Average snowfall in September: 0mm
The month with the highest snowfall is March (232mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Grande-Vallée, Canada
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (16.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grande-Vallée, Canada
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is July (Average sunshine: 9h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 0min).
Average sunshine days in September
Grande-Vallée, Canada
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is September (15.4 days).
The month with the least sunshine days is April (9.9 days).
Average UV index in September
Grande-Vallée, Canada
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Grande-Vallée, Canada
- Average cloud cover in September: 40
The months with the most cloud cover are January, February and December (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Grande-Vallée, Canada
- Average visibility in September: 9km
The months with the highest visibility are January, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are February, March and April (8km).
