September weather forecast
Calgary, Canada

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

Weather in September

With the advent of September, Calgary starts transitioning toward cooler weather, with temperatures dropping to 18°C. The rainfall takes a notable decrease, falling to 16mm, bringing back the drier conditions of Calgary weather. There's an apparent shortening in daylight hours, signaling the approaching fall season. September offers a picturesque landscape with translucent skies adorned with moving, intricate clouds. It's a time of tranquility before a new season takes over Calgary's landscapes.

Temperature

September's onset in Calgary corresponds with a subtle shift in the average high-temperature, slightly moving from an agreeable 22.9°C in August to an enjoyable 18°C. Calgary records an average temperature drop to a frosty 6.5°C in September.

Humidity

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

Rainfall

In September, the rain falls for 7.8 days. Throughout September, 16mm of precipitation is accumulated. Throughout the year, in Calgary, there are 94.1 rainfall days, and 288mm of precipitation is accumulated.

Snowfall

Months with snowfall in Calgary, Canada, are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 1.5 snowfall days, it receives 29mm of snow. In Calgary, Canada, during the entire year, snow falls for 75.3 days and aggregates up to 629mm of snow.

Daylight

In Calgary, the average length of the day in September is 12h and 37min.
On the first day of the month, sunrise is at 6:49 am and sunset at 8:22 pm. On the last day of September, sunrise is at 7:35 am and sunset at 7:17 pm MDT.

Sunshine

In September, the average sunshine is 8.8h.

UV index

In September, the average daily maximum UV index in Calgary is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: An average UV index of 3 in September transforms into this advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
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FAQ

What are September temperatures in Calgary?

During September, Calgary experiences an average high-temperature of 18°C and a low-temperature of 6.5°C.

What is the least humid month in Calgary?

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

What is the average humidity in September in Calgary?

In September, the average relative humidity in Calgary, Canada, is 59%.

How many days does it rain in September in Calgary?

In Calgary, in September, during 7.8 rainfall days, 16mm of precipitation is typically accumulated.

When does it start to snow in Calgary?

September is the first month it typically snows in Calgary, Canada. Throughout September, in the average 1.5 snowfall days, it receives 29mm of snow.

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

In September, the average day length in Calgary is 12h and 37min.

When is the sunrise / sunset in September in Calgary?

On the first day of September in Calgary, Canada, sunrise is at 6:49 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 7:17 pm MDT.

How long on average sun shines in September in Calgary?

The average sunshine duration in September in Calgary, Canada, is 8.8h.

What is the UV index intensity in September in Calgary?

In Calgary, Canada, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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%

The 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).
The 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).
The 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: 12h and 4min

The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).

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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

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

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Calgary, Canada

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