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Weather in Grande Prairie for September 2025

Your guide to Grande Prairie weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Air Quality Warning - See hour by hour.

    • Temperatures

  • So far, September 2025 in Grande Prairie shows a warmer trend than usual by 2.4 °C.

  • Expect cooler weather in the next days in Grande Prairie with the forecast suggesting a temperature of 20.8 °C, lower than the historical average.

  • In general, the average temperature in Grande Prairie at the beginning of September is 24.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.7 °C by the end of September.

    • Rain 🌧️

  • With an average of 2 rainy days, Grande Prairie experiences minimal rainfall in September.

    • More

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

Average dry days
28
Dry days
Average rainy days
2
Rainy days
Average snowy days
0
Snow days
Average temperatures
19°/7°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
58 %
Avg humidity

Grande Prairie Weather September

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

Temperatures trend during September in Grande Prairie

See the weather trend as well as the moving average line

September weather in Grande Prairie day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 28° /11° 0 mm 7
2 Sept. Sunny
Sunny
 25° /12° 0 mm 7
3 Sept. Cloudy
Cloudy
 24° /8° 0.4 mm 5
4 Sept. Mist
Mist
 19° /7° 0 mm 5
5 Sept. Sunny
Sunny
 23° /6° 0.9 mm 6
6 Sept. Patchy rain possible
Patchy rain possible
 25° /9° 0 mm 6
7 Sept. Partly cloudy
Partly cloudy
 25° /11° 0 mm 6
8 Sept. Partly cloudy
Partly cloudy
 25° /10° 0 mm 7
9 Sept. Sunny
Sunny
 23° /9° 0 mm 6
10 Sept. Sunny
Sunny
 24° /7° 0 mm 6
11 Sept. Overcast
Overcast
 23° /9° 0.1 mm 5
12 Sept. Partly cloudy
Partly cloudy
 24° /10° 0 mm 6
13 Sept. Partly cloudy
Partly cloudy
 22° /10° 0 mm 6
14 Sept. Partly cloudy
Partly cloudy
 27° /14° 0 mm 0.7
15 Sept. Sunny
Sunny
 23° /9° 0 mm 0.2
16 Sept. Sunny
Sunny
 26° /8° 0 mm 0.9
17 Sept. Sunny
Sunny
 28° /10° 0 mm 0.9
18 Sept. Sunny
Sunny
 22° /9° 0 mm 0
19 Sept. Sunny
Sunny
 23° /7° 0 mm 4
20 Sept. Sunny
Sunny
 26° /9° 0 mm 5
21 Sept. Partly cloudy
Partly cloudy
 20° /12° 0 mm 5
22 Sept. Sunny
Sunny
 18° /11° 0.1 mm 4
23 Sept. Partly cloudy
Partly cloudy
 17° /7° 0 mm 4
24 Sept. Partly cloudy
Partly cloudy
 16° /9° 0 mm 4
25 Sept. Patchy rain possible
Patchy rain possible
 14° /9° 0.9 mm 3
26 Sept. Cloudy
Cloudy
 15° /7° 0 mm 3
27 Sept. Sunny
Sunny
 16° /4° 0 mm 3
28 Sept. Patchy rain possible
Patchy rain possible
 13° /3° 0.2 mm 4
29 Sept. Patchy rain possible
Patchy rain possible
 10° /5° 0.5 mm 3
30 Sept. Patchy rain possible
Patchy rain possible
 12° /3° 0 mm 4
Next
Important Notice
Our weather forecast for Grande Prairie 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 Grande Prairie forecast closer to your planned date for the most up-to-date weather information.
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Grande Prairie in September - FAQ

What are the expected maximum and minimum temperatures in Grande Prairie during September?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Grande Prairie during September?
Expect minimal rainfall in Grande Prairie during September, with a total of 11.3 mm over approximately 2 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Grande Prairie during September?
The average wind speed in Grande Prairie during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

UV exposure in Grande Prairie during September

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

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Location coordinates Where is Grande Prairie?

Get accurate weather forecasts for Grande Prairie, located at latitude 55.167 and longitude -118.803. Stay updated with localized weather information tailored for Grande Prairie.

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