Alberta (Calgary)
September
Weather in Alberta for September 2025
Your guide to Alberta weather in September - trends and predictions
In general, the average temperature in Alberta at the beginning of September is 24.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.1 °C by the end of September.
Alberta experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 27.1 mm.
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Temperatures
Rain 🌧️
More
20
Dry days
10
Rainy days
0
Snow days
20°/8°
Temperatures
18 km/h
Avg max wind
55 %
Avg humidity
Alberta in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2  26° | 3 26° | 4  21° | 5  24° | 6 24° | 7 26° |
| 8  23° | 9 23° | 10 22° | 11  23° | 12 19° | 13 20° | 14 20° |
| 15 19° | 16 20° | 17 19° | 18 19° | 19  15° | 20 13° | 21 19° |
| 22 20° | 23 20° | 24 22° | 25 22° | 26 21° | 27 22° | 28 19° |
| 29  15° | 30 13° |
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Temperatures trend during September in Alberta
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. | Sunny | 23° /10° | 0.3 mm | 6 | |
| 2 Sept. | Partly cloudy | 26° /10° | 0 mm | 7 | |
| 3 Sept. | Partly cloudy | 26° /10° | 0 mm | 7 | |
| 4 Sept. | Cloudy | 21° /10° | 1.4 mm | 5 | |
| 5 Sept. | Overcast | 24° /9° | 0.3 mm | 6 | |
| 6 Sept. | Sunny | 24° /9° | 0.6 mm | 6 | |
| 7 Sept. | Sunny | 26° /9° | 0 mm | 6 | |
| 8 Sept. | Patchy rain possible | 23° /9° | 0.3 mm | 5 | |
| 9 Sept. | Partly cloudy | 23° /8° | 0.7 mm | 6 | |
| 10 Sept. | Sunny | 22° /7° | 0.1 mm | 6 | |
| 11 Sept. | Moderate rain at times | 23° /8° | 2.5 mm | 6 | |
| 12 Sept. | Moderate or heavy rain shower | 19° /9° | 3.9 mm | 4 | |
| 13 Sept. | Patchy rain possible | 20° /8° | 2.1 mm | 5 | |
| 14 Sept. | Overcast | 20° /7° | 0.8 mm | 5 | |
| 15 Sept. | Moderate or heavy rain shower | 19° /6° | 1.2 mm | 5 | |
| 16 Sept. | Overcast | 20° /6° | 0 mm | 5 | |
| 17 Sept. | Partly cloudy | 19° /6° | 0 mm | 5 | |
| 18 Sept. | Overcast | 19° /8° | 0 mm | 5 | |
| 19 Sept. | Mist | 15° /5° | 1.7 mm | 4 | |
| 20 Sept. | Sunny | 13° /3° | 4.8 mm | 4 | |
| 21 Sept. | Sunny | 19° /2° | 0 mm | 5 | |
| 22 Sept. | Overcast | 20° /5° | 0 mm | 5 | |
| 23 Sept. | Cloudy | 20° /6° | 0 mm | 5 | |
| 24 Sept. | Sunny | 22° /7° | 0 mm | 5 | |
| 25 Sept. | Partly cloudy | 22° /8° | 0 mm | 6 | |
| 26 Sept. | Partly cloudy | 21° /8° | 0 mm | 6 | |
| 27 Sept. | Sunny | 22° /7° | 0 mm | 6 | |
| 28 Sept. | Cloudy | 19° /6° | 1.3 mm | 5 | |
| 29 Sept. | Thundery outbreaks possible | 15° /5° | 1.9 mm | 4 | |
| 30 Sept. | Partly cloudy | 13° /5° | 3.2 mm | 4 | |
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Important Notice
Our weather forecast for Alberta 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 Alberta forecast closer to your planned date for the most up-to-date weather information.
Alberta in September - FAQ
What are the expected maximum and minimum temperatures in Alberta during September?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Alberta during September?
In September, Alberta can expect light to moderate rainfall, totaling 27.1 mm across approximately 10 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Alberta during September?
The average wind speed in Alberta during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Alberta
Explore the daily rainfall trends and prepare for Albertas September weather 💧
UV exposure in Alberta during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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