Banff
September
Weather in Banff for September 2025
Your guide to Banff weather in September - trends and predictions
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.
Banff experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 51.4 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
24
Dry days
6
Rainy days
0
Snow days
13°/4°
Temperatures
11 km/h
Avg max wind
65 %
Avg humidity
Banff Weather September
Move between months or click on a day
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
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 19° /12° | 0 mm | 5 | |
| 2 Sept. | Sunny | 20° /12° | 2.7 mm | 6 | |
| 3 Sept. |  Patchy rain possible | 14° /11° | 0.7 mm | 3 | |
| 4 Sept. | Patchy rain possible | 12° /3° | 0.2 mm | 3 | |
| 5 Sept. | Sunny | 19° /10° | 0 mm | 5 | |
| 6 Sept. | Sunny | 20° /11° | 0 mm | 6 | |
| 7 Sept. | Sunny | 20° /12° | 0 mm | 6 | |
| 8 Sept. |  Partly cloudy | 20° /11° | 0 mm | 6 | |
| 9 Sept. | Sunny | 16° /9° | 0.9 mm | 5 | |
| 10 Sept. | Patchy rain possible | 8° /3° | 9.3 mm | 2 | |
| 11 Sept. |  Patchy light rain with thunder | 10° /4° | 2 mm | 3 | |
| 12 Sept. | Light rain shower | 9° /2° | 17.3 mm | 2 | |
| 13 Sept. | Patchy rain possible | 8° /3° | 0.3 mm | 2 | |
| 14 Sept. |  Thundery outbreaks possible | 8° /3° | 0.2 mm | 2 | |
| 15 Sept. | Patchy rain possible | 9° /3° | 0.6 mm | 2 | |
| 16 Sept. | Sunny | 13° /5° | 0 mm | 4 | |
| 17 Sept. |  Light rain | 15° /5° | 17.3 mm | 4 | |
| 18 Sept. |  Cloudy | 15° /4° | 0 mm | 4 | |
| 19 Sept. |  Overcast | 13° /3° | 0 mm | 3 | |
| 20 Sept. | Thundery outbreaks possible | 8° /-1° | 0 mm | 2 | |
| 21 Sept. | Cloudy | 12° /-1° | 0 mm | 3 | |
| 22 Sept. | Thundery outbreaks possible | 11° /1° | 0 mm | 3 | |
| 23 Sept. | Overcast | 12° /1° | 0 mm | 3 | |
| 24 Sept. | Cloudy | 21° /5° | 0 mm | 5 | |
| 25 Sept. | Sunny | 20° /5° | 0 mm | 6 | |
| 26 Sept. | Partly cloudy | 9° /0° | 0 mm | 3 | |
| 27 Sept. | Partly cloudy | 11° /-1° | 0 mm | 4 | |
| 28 Sept. | Overcast | 15° /-1° | 0 mm | 4 | |
| 29 Sept. | Partly cloudy | 9° /-3° | 0 mm | 3 | |
| 30 Sept. | Sunny | 6° /-4° | 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.
Change Month
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 ☀️
Quick links
More Banff weather pages
You are here
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.
Found a mistake?
We appreciate your attention to details. Tell us here.