Helena Weather in October

The climate in Helena during October can be summarized as mild and reasonably dry.

October is in the fall / autumn in Helena and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a comfortable 24°C (75°F), whilst at night 10°C (50°F) is normal.

On average October is the 2nd driest month of the year in Helena with around 76mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.6 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Helena in October 2025.