10-Day Weather Forecast - Decatur, IL

Areas of frost in the morning. Sunny. Highs in the mid 60s. South winds 5 to 10 mph.

Clear. Lows in the mid 30s. Southeast winds around 5 mph.

Mostly clear. Highs in the mid 70s.

Mostly clear. Lows in the lower 40s.

Mostly clear. Highs in the mid 70s.

Mostly clear. Lows in the lower 40s.

Mostly clear. Highs in the mid 70s.

Mostly clear. Lows in the upper 40s.

Mostly clear. Highs in the lower 80s.

Mostly clear. Lows in the upper 40s.

Mostly clear. Highs in the lower 80s.

Clear. Low temperature around 49F. Dew point will be around 45F with an average humidity of 70%. Winds will be 5 mph from the ESE.

Sunny. High temperature around 72F. Dew point will be around 49F with an average humidity of 58%. Winds will be 7 mph from the SE.

Clear. Low temperature around 50F. Dew point will be around 46F with an average humidity of 72%. Winds will be 7 mph from the SE.

Mostly cloudy. High temperature around 71F. Dew point will be around 50F with an average humidity of 59%. Winds will be 7 mph from the SSE.

Cloudy. Low temperature around 54F. Dew point will be around 49F with an average humidity of 73%. Winds will be 5 mph from the SSE.