Weather in Helena in September
The weather in Helena in September is variable, when the days are comfortable with over 24 degrees, while it might get colder when night falls with less than 6 degrees on average. Also, there are around 9 days of rain, so it is advisable to take appropriate clothes.
Avg Temp
6° - 24°
Avg Rainy Days
9
Avg Dry Days
21
Avg Snow Days
0
Weather Facts - Helena in September
* The warmest temperature recorded in in September is 36°C
* The coldest temperature recorded in Helena in September is (-7°C)
* The average rainfall in Helena in September is 22 mm