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Canada weather

Weather in Banff for September 2025

Your guide to Banff weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Banff at the beginning of September is 17.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13 °C by the end of September.

    • Rain 🌧️

  • Banff experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 51.4 mm.

    • More

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Average dry days
24
Dry days
Average rainy days
6
Rainy days
Average snowy days
0
Snow days
Average temperatures
13°/4°
Temperatures
Average wind speed
11 km/h
Avg max wind
Average humidity
65 %
Avg humidity

Banff in September average weather

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Sunny
19°
2
Sunny
20°
3
Patchy rain possible
14°
4
Patchy rain possible
12°
5
Sunny
19°
6
Sunny
20°
7
Sunny
20°
8
Partly cloudy
20°
9
Sunny
16°
10
Patchy rain possible
8°
11
Patchy light rain with thunder
10°
12
Light rain shower
9°
13
Patchy rain possible
8°
14
Thundery outbreaks possible
8°
15
Patchy rain possible
9°
16
Sunny
13°
17
Light rain
15°
18
Cloudy
15°
19
Overcast
13°
20
Thundery outbreaks possible
8°
21
Cloudy
12°
22
Thundery outbreaks possible
11°
23
Overcast
12°
24
Cloudy
21°
25
Sunny
20°
26
Partly cloudy
9°
27
Partly cloudy
11°
28
Overcast
15°
29
Partly cloudy
9°
30
Sunny
6°
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Temperatures trend during September in Banff

See the weather trend as well as the moving average line

September weather day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 19° /12° 0 mm 5
2 Sept. Sunny
Sunny
 20° /12° 2.7 mm 6
3 Sept. Patchy rain possible
Patchy rain possible
 14° /11° 0.7 mm 3
4 Sept. Patchy rain possible
Patchy rain possible
 12° /3° 0.2 mm 3
5 Sept. Sunny
Sunny
 19° /10° 0 mm 5
6 Sept. Sunny
Sunny
 20° /11° 0 mm 6
7 Sept. Sunny
Sunny
 20° /12° 0 mm 6
8 Sept. Partly cloudy
Partly cloudy
 20° /11° 0 mm 6
9 Sept. Sunny
Sunny
 16° /9° 0.9 mm 5
10 Sept. Patchy rain possible
Patchy rain possible
 8° /3° 9.3 mm 2
11 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 10° /4° 2 mm 3
12 Sept. Light rain shower
Light rain shower
 9° /2° 17.3 mm 2
13 Sept. Patchy rain possible
Patchy rain possible
 8° /3° 0.3 mm 2
14 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 8° /3° 0.2 mm 2
15 Sept. Patchy rain possible
Patchy rain possible
 9° /3° 0.6 mm 2
16 Sept. Sunny
Sunny
 13° /5° 0 mm 4
17 Sept. Light rain
Light rain
 15° /5° 17.3 mm 4
18 Sept. Cloudy
Cloudy
 15° /4° 0 mm 4
19 Sept. Overcast
Overcast
 13° /3° 0 mm 3
20 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 8° /-1° 0 mm 2
21 Sept. Cloudy
Cloudy
 12° /-1° 0 mm 3
22 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 11° /1° 0 mm 3
23 Sept. Overcast
Overcast
 12° /1° 0 mm 3
24 Sept. Cloudy
Cloudy
 21° /5° 0 mm 5
25 Sept. Sunny
Sunny
 20° /5° 0 mm 6
26 Sept. Partly cloudy
Partly cloudy
 9° /0° 0 mm 3
27 Sept. Partly cloudy
Partly cloudy
 11° /-1° 0 mm 4
28 Sept. Overcast
Overcast
 15° /-1° 0 mm 4
29 Sept. Partly cloudy
Partly cloudy
 9° /-3° 0 mm 3
30 Sept. Sunny
Sunny
 6° /-4° 0 mm 3
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Important Notice
Our weather forecast for Banff 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 Banff forecast closer to your planned date for the most up-to-date weather information.

Banff in September - FAQ

What are the expected maximum and minimum temperatures in Banff during September?
Prepare for cooler days with highs just around 13° and colder nights, dipping below 4°.
How much rainfall should be expected in Banff during September?
Moderate rainfall is anticipated in Banff during September, with a total of 51.4 mm spread over approximately 6 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Banff during September?
The average wind speed in Banff during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Banff

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

UV exposure in Banff during September

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

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Location coordinates Where is Banff?

Get accurate weather forecasts for Banff, located at latitude 51.176 and longitude -115.57. Stay updated with localized weather information tailored for Banff.

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