Kalispell Weather in August

The climate in Kalispell during August can be summarized as mild and reasonably dry.

August is in the summer in Kalispell and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (79°F), whilst at night 8°C (46°F) is normal.

On average August is the 5th wettest month of the year in Kalispell with around 37mm 1.5 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 11.2 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 Kalispell in August 2025.