The temperatures in Lethbridge in September are quite cold with temperatures between 9°C and 21°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Lethbridge during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Please note that Lethbridge can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Lethbridge in September 2025.
If you’re planning to visit Lethbridge in the near future, we highly recommend that you review the 14 day weather forecast for Lethbridge before you arrive.
Temperatures
21° / 9°
Rainy Days
3
Snowy Days
1
Dry Days
27
Rainfall
42
mm
Sun Hours
11.1
Hrs
