10-Day Weather Forecast - Decatur, IL

Showers with a slight chance of thunderstorms in the morning then showers in the afternoon. Breezy with highs in the lower 50s. Temperature falling to around 40 in the afternoon. South winds around 25 mph with gusts up to 45 mph becoming west with gusts up to 35 mph in the afternoon. Chance of rain 90 percent.

Mostly cloudy. A chance of snow in the evening. Little or no snow accumulation. Blustery and much cooler with lows around 17. West winds 20 to 25 mph with gusts up to 40 mph. Chance of snow 40 percent. Wind chill values as low as 1 below.

Sunny. Much cooler with highs in the lower 30s. West winds 15 to 20 mph with gusts up to 30 mph becoming southwest around 10 mph in the afternoon. Wind chill values as low as zero in the morning.

Partly cloudy in the evening then becoming mostly cloudy. Lows in the mid 20s. Temperature rising into the lower 30s after midnight. South winds 15 to 20 mph with gusts up to 30 mph.

Mostly cloudy in the morning then becoming partly sunny. Not as cool with highs in the upper 40s.

Partly cloudy in the evening then clearing. Lows in the lower 20s.

Sunny cooler with highs in the upper 30s.

Mostly cloudy. Lows in the mid 20s. Highs in the lower 40s.

Mostly cloudy. Lows in the mid 20s. Highs in the lower 40s.

Mostly cloudy. Lows in the mid 30s. Highs in the lower 50s.

Mostly cloudy. Lows in the mid 30s. Highs in the lower 50s.

Mostly cloudy. Lows in the mid 30s. Highs in the lower 50s.

Mostly cloudy. Lows in the mid 30s. Highs in the lower 50s.

Cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 51F. Dew point will be around 48F with an average humidity of 89%. Winds will be 10 mph from the S.

Cloudy. High temperature around 58F. Dew point will be around 50F with an average humidity of 82%. Winds will be 10 mph from the SW.

Cloudy. Low temperature around 53F. Dew point will be around 52F with an average humidity of 89%. Winds will be 9 mph from the SW.

Cloudy. High temperature around 59F. Dew point will be around 49F with an average humidity of 76%. Winds will be 8 mph from the SW.

Cloudy. Low temperature around 43F. Dew point will be around 41F with an average humidity of 77%. Winds will be 3 mph from the W.