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Canada weather

Weather in Banff for September 2025

Your guide to Banff weather in September - trends and predictions

    Snow Forecast ❄️

  • Snowfall in Banff during September is quite rare, with fewer than 2 snowy days on average.
    According to Banff snow forecast for September 2025, 1 snowy day is expected in the next 2 weeks at Saturday, 27 September.

    • Temperatures

  • So far, September 2025 in Banff is slightly warmer than the historical average by 2 °C.

  • The forecast for the next days in Banff predicts a temperature of 13.4 °C, which is cooler than the historical average.

  • 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 7.1 °C by the end of September.

    • Rain 🌧️

  • Banff experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 51.4 mm.

    • More

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

Average dry days
23
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
14°/4°
Temperatures
Average wind speed
11 km/h
Avg max wind
Average humidity
66 %
Avg humidity

Banff Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
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
Sunny
21°
15
Thundery outbreaks possible
18°
16
Sunny
19°
17
Sunny
18°
18
Sunny
17°
19
Sunny
15°
20
Sunny
18°
21
Sunny
17°
22
Sunny
14°
23
Partly cloudy
10°
24
Patchy rain possible
9°
25
Partly cloudy
4°
26
Patchy rain possible
4°
27
Moderate or heavy sleet
3°
28
Overcast
15°
29
Partly cloudy
9°
30
Sunny
6°

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 Snow More
1 Sept. Sunny
Sunny
 23° /10° 0 mm 0 cm
2 Sept. Sunny
Sunny
 20° /10° 1.3 mm 0 cm
3 Sept. Patchy rain possible
Patchy rain possible
 20° /10° 0.3 mm 0 cm
4 Sept. Patchy rain possible
Patchy rain possible
 13° /4° 0.1 mm 0 cm
5 Sept. Sunny
Sunny
 19° /8° 0 mm 0 cm
6 Sept. Sunny
Sunny
 21° /9° 0 mm 0 cm
7 Sept. Sunny
Sunny
 22° /11° 0 mm 0 cm
8 Sept. Partly cloudy
Partly cloudy
 18° /9° 0 mm 0 cm
9 Sept. Sunny
Sunny
 18° /7° 0.5 mm 0 cm
10 Sept. Patchy rain possible
Patchy rain possible
 12° /5° 9.7 mm 0 cm
11 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 15° /5° 1 mm 0 cm
12 Sept. Light rain shower
Light rain shower
 14° /4° 8.6 mm 0 cm
13 Sept. Patchy rain possible
Patchy rain possible
 14° /6° 0.2 mm 0 cm
14 Sept. Sunny
Sunny
 21° /7° 0 mm 0 cm
15 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 18° /8° 0 mm 0 cm
16 Sept. Sunny
Sunny
 19° /8° 0 mm 0 cm
17 Sept. Sunny
Sunny
 18° /7° 0 mm 0 cm
18 Sept. Sunny
Sunny
 17° /8° 0 mm 0 cm
19 Sept. Sunny
Sunny
 15° /6° 0 mm 0 cm
20 Sept. Sunny
Sunny
 18° /8° 0 mm 0 cm
21 Sept. Sunny
Sunny
 17° /9° 0 mm 0 cm
22 Sept. Sunny
Sunny
 14° /7° 0 mm 0 cm
23 Sept. Partly cloudy
Partly cloudy
 10° /5° 0.1 mm 0 cm
24 Sept. Patchy rain possible
Patchy rain possible
 9° /3° 2 mm 0 cm
25 Sept. Partly cloudy
Partly cloudy
 4° /-1° 0 mm 0 cm
26 Sept. Patchy rain possible
Patchy rain possible
 4° /-2° 0.3 mm 0 cm
27 Sept. Moderate or heavy sleet
Moderate or heavy sleet
 3° /-4° 15.4 mm 0.7 cm
28 Sept. Overcast
Overcast
 15° /-1° 0 mm 0 cm
29 Sept. Partly cloudy
Partly cloudy
 9° /-3° 0 mm 0 cm
30 Sept. Sunny
Sunny
 6° /-4° 0 mm 0 cm
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?
Prepare for cooler days with highs just around 14° 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 7 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.

Banff snow forecast September 2025

Track daily snowfall levels and discover Banff’s snowy potential this September ❄️

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 ☀️

Quick links

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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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