September weather forecastStewart Valley, Canada
September
Weather in September
September, the first month of the autumn in Stewart Valley, is still a comfortable month, with an average temperature varying between 10.2°C (50.4°F) and 19.5°C (67.1°F).Temperature
The arrival of September corresponds with a temperature reduction, down from August's moderately hot 25.3°C (77.5°F) to an enjoyable 19.5°C (67.1°F). Stewart Valley, during the month of September, experiences an average low-temperature of 10.2°C (50.4°F).Humidity
The average relative humidity in September is 51%.Rainfall
In Stewart Valley, in September, it is raining for 6.3 days, with typically 20mm (0.79") of accumulated precipitation. In Stewart Valley, during the entire year, the rain falls for 87.2 days and collects up to 282mm (11.1") of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 7mm (0.28") of snow. Throughout the year, there are 84.2 snowfall days, and 560mm (22.05") of snow is accumulated.Daylight
In Stewart Valley, the average length of the day in September is 12h and 36min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:55 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:50 pm CST.
Sunshine
The average sunshine in September is 8.5h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Act with care - Obligation to protect against skin and eye damage is highlighted. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Stewart Valley, Canada
- Average high temperature in September: 19.5°C
The warmest month (with the highest average high temperature) is July (25.8°C).
The month with the lowest average high temperature is February (-6.5°C).
- Average low temperature in September: 10.2°C
The month with the highest average low temperature is August (14.5°C).
The coldest month (with the lowest average low temperature) is February (-13.8°C).
Average pressure in September
Stewart Valley, Canada
- Average pressure in September: 1013.3mbar
The month with the highest atmospheric pressure is February (1021.1mbar).
The month with the lowest atmospheric pressure is June (1010mbar).
Average wind speed in September
Stewart Valley, Canada
- Average wind speed in September: 15.8km/h
The windiest month (with the highest average wind speed) is January (18.9km/h).
The calmest month (with the lowest average wind speed) is August (14.5km/h).
Average humidity in September
Stewart Valley, Canada
- Average humidity in September: 51%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is August (49%).
Average rainfall in September
Stewart Valley, Canada
- Average rainfall in September: 20mm
The wettest month (with the highest rainfall) is June (54mm).
The driest month (with the least rainfall) is December (14mm).
Average rainfall days in September
Stewart Valley, Canada
- Average rainfall days in September: 6.3 days
The month with the highest number of rainy days is June (13.1 days).
The months with the least rainy days are January and February (3 days).
Average snowfall in September
Stewart Valley, Canada
- Average snowfall in September: 7mm
The month with the highest snowfall is November (100mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Stewart Valley, Canada
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is December (15.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Stewart Valley, Canada
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 6min).
- Average sunshine in September: 8h and 30min
The month with the most sunshine is July (Average sunshine: 13h and 18min).
The month with the least sunshine is December (Average sunshine: 3h and 24min).
Average sunshine days in September
Stewart Valley, Canada
- Average sunshine days in September: 22.7 days
The month with the most sunshine days is September (22.7 days).
The month with the least sunshine days is March (12.1 days).
Average UV index in September
Stewart Valley, Canada
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Stewart Valley, Canada
- Average cloud cover in September: 26
The month with the most cloud cover is February (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 21).
Average visibility in September
Stewart Valley, Canada
- Average visibility in September: 10km
The months with the highest visibility are May, June, July, August and September (10km).
The months with the lowest visibility are January, February, March and December (8km).
