Typical Weather in St Louis, MO in August
88° F Avg High
70° F Avg Low
5 Rainy Days
☀️ Temperature Summary
August is a popular time to visit, with an inviting climate featuring warm temperatures. August is one of the warmer months of the year for St Louis, with highs averaging around 88°F. Overnight lows will be around 70°F on average.
Be ready to seek shade during the day, as mid-day temperatures can be dangerous if you're caught without a way to cool off. If you want to avoid the August heat, you may consider visiting in September instead, when highs are often closer to 81°.
High Temps Throughout the Year
🎒 What to Pack
Pick up a few of these items to keep your trip fun and comfortable.
☔ Rain Summary
In August you can expect close to a 17% chance of rain for any given day. It rains less than usual in August, with total rainfall for the month typically near 3 inches.
Rainfall Throughout the Year
Planning a trip to St Louis? Try our free trip weather planner