Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
As Alert, Canada, welcomes September, there is a noticeable shift in the average high-temperature, dropping from August's icy 2.4°C (36.3°F) to a freezing cold -6.7°C (19.9°F). Alert maintains a near steady average temperature of -10.1°C (13.8°F) during the nights of September, demonstrating little drop from daytime highs.Humidity
In Alert, the average relative humidity in September is 84%.Rainfall
In September, in Alert, the rain falls for 1.5 days. Throughout September, 9mm (0.35") of precipitation is accumulated. Throughout the year, in Alert, there are 20.4 rainfall days, and 65mm (2.56") of precipitation is accumulated.Snowfall
January through December are months with snowfall. September is the month with the most snowfall in Alert, Canada. Snow falls for 10.5 days and accumulates 72mm (2.83") of snow.Daylight
With an average of 13h and 12min of daylight, September has the longest days of the year.On the first day of the month, sunrise is at 8:00 pm and sunset at 8:00 pm. On the last day of September, sunrise is at 7:10 am and sunset at 4:47 pm EDT.
Sunshine
The month with the most sunshine in Alert is September, with an average of 6.5h of sunshine.UV index
January through March, August through November, with an average maximum UV index of 1, are months with the lowest UV index in Alert. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 1 during September translates into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Frequently asked questions
How cold is it in Alert in September?
What is the average humidity in September in Alert?
How many days does it rain in September in Alert?
What is the snowiest month in Alert?
How much does it snow in Alert in September?
When are the longest days in Alert?
How many hours of daylight does Alert have in September?
When are sunrise and sunset in September in Alert?
What month has the most sunshine in Alert?
How many hours of sunshine does Alert have in September?
When is the lowest UV index in Alert?
What is the UV index reading in September in Alert?
Average temperature in September
Alert, Canada
- Average high temperature in September: -6.7°C
The warmest month (with the highest average high temperature) is July (4.3°C).
The month with the lowest average high temperature is February (-27.9°C).
- Average low temperature in September: -10.1°C
The month with the highest average low temperature is July (1.8°C).
The coldest month (with the lowest average low temperature) is February (-32.8°C).
Average pressure in September
Alert, Canada
- Average pressure in September: 1009.9mbar
The month with the highest atmospheric pressure is May (1019.6mbar).
The month with the lowest atmospheric pressure is September (1009.9mbar).
Average wind speed in September
Alert, Canada
- Average wind speed in September: 9.9km/h
The windiest months (with the highest average wind speed) are January and August (11.2km/h).
The calmest month (with the lowest average wind speed) is April (8.7km/h).
Average humidity in September
Alert, Canada
- Average humidity in September: 84%
The months with the highest relative humidity are January, February and March (92%).
The months with the lowest relative humidity are July and August (79%).
Average rainfall in September
Alert, Canada
- Average rainfall in September: 9mm
The wettest month (with the highest rainfall) is August (11mm).
The driest month (with the least rainfall) is April (2mm).
Average rainfall days in September
Alert, Canada
- Average rainfall days in September: 1.5 days
The month with the highest number of rainy days is July (4.6 days).
The months with the least rainy days are February and November (0.3 days).
Average snowfall in September
Alert, Canada
- Average snowfall in September: 72mm
The month with the highest snowfall is September (72mm).
The month with the least snowfall is July (9mm).
Average snowfall days in September
Alert, Canada
- Average snowfall days in September: 10.5 days
The month with the highest number of snowfall days is October (12.5 days).
The month with the least snowfall days is July (1.8 days).
Average daylight in September /
Average sunshine in September
Alert, Canada
- Average daylight in September: 13h and 1min
The month with the longest days is September (Average daylight: 13h and 12min).
The months with the shortest days are January, May, June, July, August, November and December (Average daylight: 0h and 0min).
- Average sunshine in September: 6h and 3min
The month with the most sunshine is September (Average sunshine: 6h and 30min).
The month with the least sunshine is August (Average sunshine: 0h and 0min).
Average sunshine days in September
Alert, Canada
- Average sunshine days in September: 19.9 days
The month with the most sunshine days is April (25.8 days).
The month with the least sunshine days is October (19.7 days).
Average UV index in September
Alert, Canada
- Average UV index in September: 1
The months with the highest UV index are April, May, June, July and December (UV index 2).
The months with the lowest UV index are January, February, March, August, September, October and November (UV index 1).
Average cloud cover in September
Alert, Canada
- Average cloud cover in September: 53
The months with the most cloud cover are January and March (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 40).
Average visibility in September
Alert, Canada
- Average visibility in September: 8km
The months with the highest visibility are June and July (10km).
The months with the lowest visibility are January, February and March (6km).
Alert, Canada
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