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Weather in Calgary for September 2025

Your guide to Calgary weather in September - trends and predictions
  • In general, the average temperature in Calgary at the beginning of September is 24.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.6 °C by the end of September.

  • Calgary sees moderate rainfall in September, averaging 8 rainy days.

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Average dry days
22
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
20°/7°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
58 %
Avg humidity

Calgary in September average weather

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Temperatures trend during September in Calgary

See the weather trend as well as the moving average line

September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Overcast
Overcast
26° /11° 0.3 mm 7
2 Sept. Partly cloudy
Partly cloudy
31° /12° 0 mm 8
3 Sept. Overcast
Overcast
26° /11° 0 mm 6
4 Sept. Light rain shower
Light rain shower
15° /9° 2.8 mm 4
5 Sept. Thundery outbreaks possible
Thundery outbreaks possible
24° /8° 0.1 mm 6
6 Sept. Patchy rain possible
Patchy rain possible
24° /10° 1.2 mm 6
7 Sept. Partly cloudy
Partly cloudy
26° /10° 0 mm 7
8 Sept. Thundery outbreaks possible
Thundery outbreaks possible
24° /11° 0 mm 6
9 Sept. Mist
Mist
24° /8° 0.4 mm 6
10 Sept. Sunny
Sunny
21° /8° 0.1 mm 5
11 Sept. Overcast
Overcast
22° /8° 0 mm 6
12 Sept. Thundery outbreaks possible
Thundery outbreaks possible
19° /10° 4.9 mm 4
13 Sept. Thundery outbreaks possible
Thundery outbreaks possible
20° /9° 2.8 mm 5
14 Sept. Sunny
Sunny
20° /8° 1.5 mm 5
15 Sept. Sunny
Sunny
21° /7° 0 mm 6
16 Sept. Sunny
Sunny
24° /7° 0 mm 6
17 Sept. Overcast
Overcast
22° /9° 0 mm 5
18 Sept. Cloudy
Cloudy
19° /9° 0 mm 4
19 Sept. Mist
Mist
16° /6° 3.2 mm 4
20 Sept. Moderate rain
Moderate rain
10° /4° 9.6 mm 3
21 Sept. Cloudy
Cloudy
18° /2° 0 mm 5
22 Sept. Overcast
Overcast
19° /5° 0 mm 5
23 Sept. Cloudy
Cloudy
22° /7° 0 mm 5
24 Sept. Overcast
Overcast
22° /9° 0 mm 6
25 Sept. Overcast
Overcast
24° /9° 0 mm 6
26 Sept. Overcast
Overcast
19° /9° 0 mm 5
27 Sept. Thundery outbreaks possible
Thundery outbreaks possible
19° /6° 0 mm 5
28 Sept. Patchy light rain with thunder
Patchy light rain with thunder
16° /4° 1.3 mm 4
29 Sept. Thundery outbreaks possible
Thundery outbreaks possible
14° /3° 0.6 mm 4
30 Sept. Light rain shower
Light rain shower
9° /3° 6.3 mm 3
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Important Notice
Our weather forecast for Calgary in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Calgary forecast closer to your planned date for the most up-to-date weather information.

Calgary in September - FAQ

What are the expected maximum and minimum temperatures in Calgary during September?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Calgary during September?
Moderate rainfall is anticipated in Calgary during September, with a total of 50.7 mm spread over approximately 8 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Calgary during September?
The average wind speed in Calgary during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Calgary

Explore the daily rainfall trends and prepare for Calgarys September weather 💧

UV exposure in Calgary during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Calgary?

Get accurate weather forecasts for Calgary, located at latitude 51.05 and longitude -114.085. Stay updated with localized weather information tailored for Calgary.

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