September weather forecast and climate
Calgary, Canada

The magnificent skyscrapers of the city of Calgary, Canada
The magnificent skyscrapers of the city of Calgary, Canada

Weather in September

The first month of the autumn, September, is also an enjoyable month in Calgary, Canada, with average temperature fluctuating between 6.5°C (43.7°F) and 18°C (64.4°F).

Temperature

In Calgary, the average high-temperature slightly decreases, from a pleasant 22.9°C (73.2°F) in August, to a comfortable 18°C (64.4°F). In Calgary, the average low-temperature is 6.5°C (43.7°F).

Humidity

The least humid month in Calgary is September, with an average relative humidity of 59%.

Rainfall

In Calgary, in September, it is raining for 7.8 days, with typically 16mm (0.63") of accumulated precipitation. Throughout the year, in Calgary, Canada, there are 94.1 rainfall days, and 288mm (11.34") of precipitation is accumulated.

Snowfall

January through June, September through December are months with snowfall in Calgary, Canada. September is the first month it typically snows in Calgary. Throughout September, in the average 1.5 snowfall days, it receives 29mm (1.14") of snow. Throughout the year, in Calgary, there are 75.3 snowfall days, and 629mm (24.76") of snow is accumulated.

Daylight

In Calgary, the average length of the day in September is 12.6h.

Sunshine

In September, the average sunshine is 8.8h.

UV index

The average daily maximum UV index in Calgary is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 3 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the least humid month in Calgary?

The least humid month in Calgary, Canada, is September, with an average relative humidity of 59%.

What is the average humidity in September in Calgary?

The average relative humidity in September is 59%.

How much does it rain in Calgary in September?

In Calgary, Canada, in September, during 7.8 rainfall days, 16mm (0.63") of precipitation is typically accumulated.

When does it start snowing in Calgary?

September is the first month it typically snows. Throughout September, in the average 1.5 snowfall days, it receives 29mm (1.14") of snow.

What is the average length of the day in September in Calgary?

In September, the average length of the day in Calgary is 12.6h.

How many hours of sunshine does Calgary have in September?

The average sunshine in September is 8.8h.

What is the UV index intensity in September in Calgary?

The average daily maximum UV index in September in Calgary, Canada, is 3. A UV Index of 3 to 5 symbolizes a medium hazard to health from the exposure to the Sun's UV rays.

Average temperature in September
Calgary, Canada

Average temperature in September - Calgary, Canada
  • Average high temperature in September: 18°C

The warmest month (with the highest average high temperature) is August (22.9°C).
The month with the lowest average high temperature is December (-4.8°C).

  • Average low temperature in September: 6.5°C

The month with the highest average low temperature is July (10°C).
The coldest month (with the lowest average low temperature) is December (-11.5°C).

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Average pressure in September
Calgary, Canada

Average pressure in September - Calgary, Canada
  • Average pressure in September: 1013.8mbar

The month with the highest atmospheric pressure is February (1019.3mbar).
The month with the lowest atmospheric pressure is June (1010.8mbar).

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Average wind speed in September
Calgary, Canada

Average wind speed in September - Calgary, Canada
  • Average wind speed in September: 10.9km/h

The windiest month (with the highest average wind speed) is January (13.1km/h).
The calmest month (with the lowest average wind speed) is August (10.3km/h).

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Average humidity in September
Calgary, Canada

Average humidity in September - Calgary, Canada
  • Average humidity in September: 59%

Months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is September (59%).

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Average rainfall in September
Calgary, Canada

Average rainfall in September - Calgary, Canada
  • Average rainfall in September: 16mm

The wettest month (with the highest rainfall) is June (65mm).
The driest month (with the least rainfall) is January (9mm).

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Average rainfall days in September
Calgary, Canada

Average rainfall days in September - Calgary, Canada
  • Average rainfall days in September: 7.8 days

The month with the highest number of rainy days is June (17 days).
The month with the least rainy days is November (2.5 days).

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Average snowfall in September
Calgary, Canada

Average snowfall in September - Calgary, Canada
  • Average snowfall in September: 29mm

The month with the highest snowfall is April (102mm).
Months with the least snowfall are July and August (0mm).

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Average snowfall days in September
Calgary, Canada

Average snowfall days in September - Calgary, Canada
  • Average snowfall days in September: 1.5 days

The month with the highest number of snowfall days is February (12.9 days).
Months with the least snowfall days are July and August (0 days).

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Average daylight in September /
Average sunshine in September
Calgary, Canada

Average daylight in September / Average sunshine in September - Calgary, Canada
  • Average daylight in September: 12.6h

The month with the longest days is June (Average daylight: 16.5h).
The month with the shortest days is December (Average daylight: 8h).

  • Average sunshine in September: 8.8h

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 5.2h).

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Average sunshine days in September
Calgary, Canada

Average sunshine days in September - Calgary, Canada
  • Average sunshine days in September: 20.1 days

The month with the most sunshine days is October (22.1 days).
The month with the least sunshine days is June (10.7 days).

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Average UV index in September
Calgary, Canada

Average UV index in September - Calgary, Canada
  • Average UV index in September: 3

The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in September
Calgary, Canada

Average cloud cover in September - Calgary, Canada
  • Average cloud cover in September: 30

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 24).

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Average visibility in September
Calgary, Canada

Average visibility in September - Calgary, Canada
  • Average visibility in September: 10km

Months with the highest visibility are June, August and September (10km).
Months with the lowest visibility are January, February, March, April, May, July, October, November and December (9km).

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