Typical Weather in Decatur;, IL in August
85° F Avg High
64° F Avg Low
5 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 85°F, which is warmer than usual in Decatur;. Overnight lows will be around 64°F on average.
August is a great time to visit Decatur;, with mild temperatures and sunny days being very common.
High Temps Throughout the Year
🎒 What to Pack
Pick up a few of these items to keep your trip fun and comfortable.
☔ Rain Summary
You can expect about a 17% chance of rain for any given day in August. It's one of the drier months of the year for Decatur;, with total rainfall for the month around 4 inches.
Rainfall Throughout the Year
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