Typical Weather in Helena, MT in August

84° F Avg High

52° F Avg Low

3 Rainy Days

☀️ Temperature Summary

August is a popular time of year to visit, with an inviting climate characterized by warm temperatures. Highs in August are typically around 84°F, which is warmer than usual in Helena. Overnight lows will be around 52°F on average. Daily high temperatures can range between 84°F and 79°F for the month of August.

The warm, dry temperatures in August make Helena a great destination to relax and soak up the sun.

High Temps Throughout the Year

☔ Rain Summary

You can expect about a 10% chance of rain for any given day in August. It's one of the rainier months of the year for Helena, with total rainfall for the month around 1 inches.