The temperatures in Helena in September are quite cold with temperatures between 6°C and 21°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Helena 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 Helena can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Helena in September 2024.
If you’re planning to visit Helena in the near future, we highly recommend that you review the 14 day weather forecast for Helena before you arrive.
Temperatures
21° / 6°
Rainy Days
3
Snowy Days
1
Dry Days
26
Rainfall
44
mm
Sun Hours
9.6
Hrs
