September weather forecastWhitehorse, Canada
September
Weather in September
September signals the beginning of fall in Whitehorse with a substantial temperature drop and diminishing daylight hours. A significant decrease can be observed in average maximum temperatures, which get pulled down to 9.4°C (48.9°F). The city experiences rainfall of 23mm (0.91"), a reduction when compared with the preceding summer months. As daylight hours retract to around 12.8 hours, it paves the way for stunning fall foliage which can be strutting its riotous colors. The weather starts exuding a distinct crispness, heralding the incoming cold weather.Temperature
A decrease in the average high-temperature is observed during September, shifting from a moderate 15.3°C (59.5°F) in August to a chilly 9.4°C (48.9°F). Whitehorse's average low-temperature in the month of September is recorded at a cold 1.5°C (34.7°F).Humidity
In September, the average relative humidity in Whitehorse is 76%.Rainfall
In Whitehorse, during September, the rain falls for 13.7 days and regularly aggregates up to 23mm (0.91") of precipitation. In Whitehorse, during the entire year, the rain falls for 125.2 days and collects up to 255mm (10.04") of precipitation.Snowfall
January through May, August through December are months with snowfall. In Whitehorse, in September, during 1.8 snowfall days, 11mm (0.43") of snow is typically accumulated. In Whitehorse, during the entire year, snow falls for 120.3 days and aggregates up to 768mm (30.24") of snow.Daylight
In Whitehorse, the average length of the day in September is 12h and 51min.On the first day of the month, sunrise is at 6:55 am and sunset at 9:04 pm. On the last day of September, in Whitehorse, sunrise is at 8:06 am and sunset at 7:33 pm PDT.
Sunshine
The average sunshine in September in Whitehorse is 8.1h.UV index
The average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the average person.Note: A maximum daily UV index of 2 during September morphs into the following directions:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. It's recommended to limit sun exposure when its radiation is at its peak during midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Whitehorse, Canada
- Average high temperature in September: 9.4°C
The warmest month (with the highest average high temperature) is July (17.8°C).
The month with the lowest average high temperature is January (-11.3°C).
- Average low temperature in September: 1.5°C
The month with the highest average low temperature is July (6.7°C).
The coldest month (with the lowest average low temperature) is January (-17.5°C).
Average pressure in September
Whitehorse, Canada
- Average pressure in September: 1010.7mbar
The month with the highest atmospheric pressure is February (1016.6mbar).
The month with the lowest atmospheric pressure is September (1010.7mbar).
Average wind speed in September
Whitehorse, Canada
- Average wind speed in September: 9.9km/h
The windiest month (with the highest average wind speed) is September (9.9km/h).
The calmest month (with the lowest average wind speed) is February (8.6km/h).
Average humidity in September
Whitehorse, Canada
- Average humidity in September: 76%
The month with the highest relative humidity is January (95%).
The month with the lowest relative humidity is June (58%).
Average rainfall in September
Whitehorse, Canada
- Average rainfall in September: 23mm
The wettest month (with the highest rainfall) is August (39mm).
The driest month (with the least rainfall) is February (12mm).
Average rainfall days in September
Whitehorse, Canada
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is August (16.1 days).
The month with the least rainy days is January (5.7 days).
Average snowfall in September
Whitehorse, Canada
- Average snowfall in September: 11mm
The month with the highest snowfall is January (148mm).
The months with the least snowfall are June and July (0mm).
Average snowfall days in September
Whitehorse, Canada
- Average snowfall days in September: 1.8 days
The month with the highest number of snowfall days is November (19.6 days).
The months with the least snowfall days are June and July (0 days).
Average daylight in September /
Average sunshine in September
Whitehorse, Canada
- Average daylight in September: 12h and 48min
The month with the longest days is June (Average daylight: 19h and 0min).
The month with the shortest days is December (Average daylight: 5h and 48min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is May (Average sunshine: 12h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in September
Whitehorse, Canada
- Average sunshine days in September: 11.9 days
The month with the most sunshine days is May (15.8 days).
The month with the least sunshine days is November (10.5 days).
Average UV index in September
Whitehorse, Canada
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
Whitehorse, Canada
- Average cloud cover in September: 43
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is May (Cloud cover 35).
Average visibility in September
Whitehorse, Canada
- Average visibility in September: 9km
The months with the highest visibility are May, June and July (10km).
The months with the lowest visibility are January, February, March and December (6km).
