10-Day Weather Forecast - Sullivan, IL

Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 104.

Mostly clear in the evening, then partly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the lower 70s. Southwest winds around 5 mph. Chance of rain 20 percent.

Sunny, hot with highs in the mid 90s. Northwest winds 5 to 10 mph. Heat index values up to 104.

Mostly clear. Humid with lows in the upper 60s. Northeast winds 5 to 10 mph.

Mostly clear. Highs in the upper 80s.

Mostly clear. Lows in the lower 60s.

Mostly clear. Highs in the upper 80s.

Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 60s.

Mostly clear. Hot. Highs in the mid 90s.

Mostly clear. Hot. Lows in the lower 70s.

Mostly clear. Hot. Highs in the mid 90s.

Partly cloudy. Lows in the lower 70s.

Partly cloudy. Highs around 90.

Mostly clear. Low temperature around 72F. Dew point will be around 69F with an average humidity of 77%. Winds will be 2 mph from the SW.

Mostly sunny. High temperature around 91F. Dew point will be around 69F with an average humidity of 62%. Winds will be 2 mph from the S.

Clear. Low temperature around 68F. Dew point will be around 67F with an average humidity of 83%. Winds will be 2 mph from the SE.

Mostly sunny. High temperature around 89F. Dew point will be around 69F with an average humidity of 65%. Winds will be 4 mph from the S.

Clear. Low temperature around 68F. Dew point will be around 67F with an average humidity of 81%. Winds will be 3 mph from the S.