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Canada weather

Weather in Banff for September 2026

Your guide to Banff weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Banff at the beginning of September is 19.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.1 °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 32.8 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
16°/5°
Temperatures
Average wind speed
10 km/h
Avg max wind
Average humidity
64 %
Avg humidity

Banff Weather September

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

Temperatures trend during September in Banff

See the weather trend as well as the moving average line

September weather in Banff day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 23° /10° 0 mm 6
2 Sept. Sunny
Sunny
 20° /10° 1.3 mm 6
3 Sept. Patchy rain possible
Patchy rain possible
 20° /10° 0.3 mm 5
4 Sept. Patchy rain possible
Patchy rain possible
 13° /4° 0.1 mm 3
5 Sept. Sunny
Sunny
 19° /8° 0 mm 5
6 Sept. Sunny
Sunny
 21° /9° 0 mm 6
7 Sept. Sunny
Sunny
 22° /11° 0 mm 6
8 Sept. Partly cloudy
Partly cloudy
 18° /9° 0 mm 5
9 Sept. Sunny
Sunny
 18° /7° 0.5 mm 5
10 Sept. Patchy rain possible
Patchy rain possible
 12° /5° 9.7 mm 3
11 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 15° /5° 1 mm 4
12 Sept. Light rain shower
Light rain shower
 14° /4° 8.6 mm 3
13 Sept. Patchy rain possible
Patchy rain possible
 14° /6° 0.2 mm 4
14 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 13° /5° 0.1 mm 3
15 Sept. Patchy rain possible
Patchy rain possible
 12° /4° 2.3 mm 3
16 Sept. Sunny
Sunny
 16° /5° 0 mm 5
17 Sept. Light rain
Light rain
 20° /7° 8.7 mm 5
18 Sept. Cloudy
Cloudy
 18° /5° 0 mm 5
19 Sept. Overcast
Overcast
 17° /4° 0 mm 5
20 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 15° /3° 0 mm 4
21 Sept. Cloudy
Cloudy
 14° /1° 0 mm 4
22 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 11° /0° 0 mm 4
23 Sept. Overcast
Overcast
 16° /1° 0 mm 5
24 Sept. Cloudy
Cloudy
 21° /5° 0 mm 6
25 Sept. Sunny
Sunny
 18° /5° 0 mm 5
26 Sept. Partly cloudy
Partly cloudy
 10° /0° 0 mm 4
27 Sept. Partly cloudy
Partly cloudy
 11° /-1° 0 mm 4
28 Sept. Overcast
Overcast
 16° /0° 0 mm 4
29 Sept. Partly cloudy
Partly cloudy
 13° /1° 0 mm 4
30 Sept. Sunny
Sunny
 10° /-1° 0 mm 3
Next
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.
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Banff in September - FAQ

What are the expected maximum and minimum temperatures in Banff during September?

Enjoy moderate daytime temperatures of up to 16° and cooler nights around 5°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Banff during September?

In September, Banff can expect light to moderate rainfall, totaling 32.8 mm across approximately 6 days. Occasional showers are possible, and planning ahead for them could be helpful.

What are the typical wind conditions in Banff during September?

The average wind speed in Banff during September is 10 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 💧
Typically, Banff has 6 rainy days in September with a total of 32.8 mm of rainfall.

UV exposure in Banff during September

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

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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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