September weather forecastCaslan, Canada
September
Weather in September
September, the first month of the autumn in Caslan, is also an enjoyable month, with an average temperature varying between 17.3°C (63.1°F) and 6.6°C (43.9°F).Temperature
Onset of September witnesses a reduction in the average high-temperature, falling from an agreeable 22.4°C (72.3°F) in August to a refreshing 17.3°C (63.1°F). During September, the temperature in Caslan tends to dip to an average of 6.6°C (43.9°F) at night.Humidity
The average relative humidity in September is 65%.Rainfall
In September, the rain falls for 9.5 days. Throughout September, 23mm (0.91") of precipitation is accumulated. Throughout the year, there are 108 rainfall days, and 338mm (13.31") of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 1.2 snowfall days, it receives 18mm (0.71") of snow. Throughout the year, there are 72.7 snowfall days, and 539mm (21.22") of snow is accumulated.Daylight
In September, the average length of the day is 12h and 41min.On the first day of September, sunrise is at 6:38 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 7:07 pm MDT.
Sunshine
In Caslan, the average sunshine in September is 8.5h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: In September, a daily maximum UV index of 3 leads to the following instructions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Direct Sun exposure should be minimized especially during midday when radiation is most intense. During bright days, sunglasses that offer UVA and UVB defense are recommended. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Caslan, Canada
- Average high temperature in September: 17.3°C
The warmest month (with the highest average high temperature) is July (22.6°C).
The month with the lowest average high temperature is December (-7.3°C).
- Average low temperature in September: 6.6°C
The month with the highest average low temperature is July (11.3°C).
The coldest month (with the lowest average low temperature) is February (-15.1°C).
Average pressure in September
Caslan, Canada
- Average pressure in September: 1013.3mbar
The month with the highest atmospheric pressure is February (1020.1mbar).
The month with the lowest atmospheric pressure is June (1010.2mbar).
Average wind speed in September
Caslan, Canada
- Average wind speed in September: 11.8km/h
The windiest month (with the highest average wind speed) is April (13.1km/h).
The calmest month (with the lowest average wind speed) is August (10.8km/h).
Average humidity in September
Caslan, Canada
- Average humidity in September: 65%
The month with the highest relative humidity is March (92%).
The month with the lowest relative humidity is May (60%).
Average rainfall in September
Caslan, Canada
- Average rainfall in September: 23mm
The wettest month (with the highest rainfall) is June (74mm).
The driest month (with the least rainfall) is February (8mm).
Average rainfall days in September
Caslan, Canada
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is June (18.9 days).
The month with the least rainy days is February (1.6 days).
Average snowfall in September
Caslan, Canada
- Average snowfall in September: 18mm
The month with the highest snowfall is November (90mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Caslan, Canada
- Average snowfall days in September: 1.2 days
The month with the highest number of snowfall days is March (13.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Caslan, Canada
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 17h and 12min).
The month with the shortest days is December (Average daylight: 7h and 24min).
- Average sunshine in September: 8h and 30min
The month with the most sunshine is June (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in September
Caslan, Canada
- Average sunshine days in September: 17.6 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is June (8.8 days).
Average UV index in September
Caslan, 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, February and March (UV index 1).
Average cloud cover in September
Caslan, Canada
- Average cloud cover in September: 34
The month with the most cloud cover is March (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Caslan, Canada
- Average visibility in September: 9km
The month with the highest visibility is August (10km).
The months with the lowest visibility are January, February and March (7km).
