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Canada weather

Weather in Alberta for September 2025

Your guide to Alberta weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Alberta has been nearly identical to the historical average, with a temperature of 23.4 °C (showing only a slight deviation of 0.3 °C).

  • Expect cooler weather in the next days in Alberta with the forecast suggesting a temperature of 19.1 °C, lower than the historical average.

  • In general, the average temperature in Alberta at the beginning of September is 24.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.6 °C by the end of September.

    • Rain 🌧️

  • Alberta experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 27.1 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
20
Dry days
Average rainy days
10
Rainy days
Average snowy days
0
Snow days
Average temperatures
20°/8°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
55 %
Avg humidity

Alberta Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
24°
2
Partly cloudy
25°
3
Overcast
27°
4
Cloudy
21°
5
Sunny
24°
6
Sunny
24°
7
Sunny
26°
8
Patchy rain possible
22°
9
Partly cloudy
24°
10
Sunny
22°
11
Moderate rain at times
23°
12
Moderate or heavy rain shower
20°
13
Patchy rain possible
21°
14
Overcast
21°
15
Moderate or heavy rain shower
18°
16
Sunny
26°
17
Sunny
25°
18
Sunny
24°
19
Patchy rain possible
23°
20
Sunny
25°
21
Patchy rain possible
14°
22
Sunny
18°
23
Sunny
23°
24
Partly cloudy
18°
25
Sunny
21°
26
Partly cloudy
14°
27
Sunny
15°
28
Patchy rain possible
10°
29
Patchy rain possible
11°
30
Partly cloudy
13°

What’s the Weather Like in Alberta This September?

Discover the average temperatures and weather trends across Alberta’s cities this September.
CloudyCalgary20 °C / 8 °CCloudyEdmonton21 °C / 8 °CSunnyBanff14 °C / 4 °CCloudyLethbridge23 °C / 9 °CCloudyGrande Prairie19 °C / 7 °CCloudyRed Deer20 °C / 7 °CCloudyFort McMurray19 °C / 9 °CCloudyMedicine Hat24 °C / 11 °CCloudyLloydminster22 °C / 9 °CPatchy rain possibleJasper16 °C / 4 °CPatchy light rain with thunderLake Louise12 °C / 2 °CCloudyAirdrie20 °C / 8 °CMore Locations

Temperatures trend during September in Alberta

See the weather trend as well as the moving average line

September weather in Alberta day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 24° /11° 0.2 mm 6
2 Sept. Partly cloudy
Partly cloudy
 25° /11° 0 mm 6
3 Sept. Overcast
Overcast
 27° /10° 0 mm 6
4 Sept. Cloudy
Cloudy
 21° /10° 1.1 mm 5
5 Sept. Sunny
Sunny
 24° /8° 0.2 mm 6
6 Sept. Sunny
Sunny
 24° /9° 0.5 mm 6
7 Sept. Sunny
Sunny
 26° /10° 0 mm 6
8 Sept. Patchy rain possible
Patchy rain possible
 22° /10° 1.4 mm 5
9 Sept. Partly cloudy
Partly cloudy
 24° /8° 0.6 mm 6
10 Sept. Sunny
Sunny
 22° /8° 1.5 mm 5
11 Sept. Moderate rain at times
Moderate rain at times
 23° /9° 2 mm 6
12 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 20° /9° 3.1 mm 5
13 Sept. Patchy rain possible
Patchy rain possible
 21° /9° 1.7 mm 5
14 Sept. Overcast
Overcast
 21° /8° 0.6 mm 5
15 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 18° /7° 0.9 mm 5
16 Sept. Sunny
Sunny
 26° /11° 0 mm 1.1
17 Sept. Sunny
Sunny
 25° /10° 0 mm 1.1
18 Sept. Sunny
Sunny
 24° /11° 0 mm 1.1
19 Sept. Patchy rain possible
Patchy rain possible
 23° /11° 0.4 mm 1
20 Sept. Sunny
Sunny
 25° /11° 0 mm 0
21 Sept. Patchy rain possible
Patchy rain possible
 14° /8° 1.1 mm 3
22 Sept. Sunny
Sunny
 18° /5° 0 mm 4
23 Sept. Sunny
Sunny
 23° /7° 0 mm 4
24 Sept. Partly cloudy
Partly cloudy
 18° /13° 0 mm 5
25 Sept. Sunny
Sunny
 21° /5° 0 mm 4
26 Sept. Partly cloudy
Partly cloudy
 14° /8° 0 mm 4
27 Sept. Sunny
Sunny
 15° /6° 0 mm 3
28 Sept. Patchy rain possible
Patchy rain possible
 10° /3° 0.2 mm 2
29 Sept. Patchy rain possible
Patchy rain possible
 11° /5° 0.4 mm 2
30 Sept. Partly cloudy
Partly cloudy
 13° /5° 3.2 mm 4
Next
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.
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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 ☀️
Provinces in Alberta
Select a province for an accurate weather forecast
Lloydminster
Top locations in Alberta
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AirdrieBanffCalgaryEdmontonFort McMurrayGrande PrairieLethbridgeLloydminsterMedicine HatRed Deer
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Quick links

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Location coordinates Where is Alberta?

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

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