Helena Weather in August

The climate in Helena during August can be summarized as hot, humid and reasonably dry.

August is in the summer in Helena and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a steamy 33°C (91°F), whilst at night 21°C (69°F) is normal.

On average August is the driest month of the year in Helena with around 75mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 10.5 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 August 2024.