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 24.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.6 °C by the end of September.
Alberta sees moderate rainfall in September, averaging 8 rainy days.
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22
Dry days
8
Rainy days
0
Snow days
20°/7°
Temperatures
19 km/h
Avg max wind
58 %
Avg humidity
Alberta in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  26° | 2  31° | 3 26° | 4  15° | 5  24° | 6 24° | 7 26° |
| 8 24° | 9  24° | 10  21° | 11 22° | 12 19° | 13 20° | 14 20° |
| 15 21° | 16 24° | 17 22° | 18  19° | 19 16° | 20  10° | 21 18° |
| 22 19° | 23 22° | 24 22° | 25 24° | 26 19° | 27 19° | 28  16° |
| 29 14° | 30 9° |
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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. | Overcast | 26° /11° | 0.3 mm | 7 | |
| 2 Sept. | Partly cloudy | 31° /12° | 0 mm | 8 | |
| 3 Sept. | Overcast | 26° /11° | 0 mm | 6 | |
| 4 Sept. | Light rain shower | 15° /9° | 2.8 mm | 4 | |
| 5 Sept. | Thundery outbreaks possible | 24° /8° | 0.1 mm | 6 | |
| 6 Sept. | Patchy rain possible | 24° /10° | 1.2 mm | 6 | |
| 7 Sept. | Partly cloudy | 26° /10° | 0 mm | 7 | |
| 8 Sept. | Thundery outbreaks possible | 24° /11° | 0 mm | 6 | |
| 9 Sept. | Mist | 24° /8° | 0.4 mm | 6 | |
| 10 Sept. | Sunny | 21° /8° | 0.1 mm | 5 | |
| 11 Sept. | Overcast | 22° /8° | 0 mm | 6 | |
| 12 Sept. | Thundery outbreaks possible | 19° /10° | 4.9 mm | 4 | |
| 13 Sept. | Thundery outbreaks possible | 20° /9° | 2.8 mm | 5 | |
| 14 Sept. | Sunny | 20° /8° | 1.5 mm | 5 | |
| 15 Sept. | Sunny | 21° /7° | 0 mm | 6 | |
| 16 Sept. | Sunny | 24° /7° | 0 mm | 6 | |
| 17 Sept. | Overcast | 22° /9° | 0 mm | 5 | |
| 18 Sept. | Cloudy | 19° /9° | 0 mm | 4 | |
| 19 Sept. | Mist | 16° /6° | 3.2 mm | 4 | |
| 20 Sept. | Moderate rain | 10° /4° | 9.6 mm | 3 | |
| 21 Sept. | Cloudy | 18° /2° | 0 mm | 5 | |
| 22 Sept. | Overcast | 19° /5° | 0 mm | 5 | |
| 23 Sept. | Cloudy | 22° /7° | 0 mm | 5 | |
| 24 Sept. | Overcast | 22° /9° | 0 mm | 6 | |
| 25 Sept. | Overcast | 24° /9° | 0 mm | 6 | |
| 26 Sept. | Overcast | 19° /9° | 0 mm | 5 | |
| 27 Sept. | Thundery outbreaks possible | 19° /6° | 0 mm | 5 | |
| 28 Sept. | Patchy light rain with thunder | 16° /4° | 1.3 mm | 4 | |
| 29 Sept. | Thundery outbreaks possible | 14° /3° | 0.6 mm | 4 | |
| 30 Sept. | Light rain shower | 9° /3° | 6.3 mm | 3 | |
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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 7°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Alberta during September?
Moderate rainfall is anticipated in Alberta 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 Alberta during September?
The average wind speed in Alberta during September is 19 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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