10-Day Weather Forecast - Summit, IL

Showers and thunderstorms in the morning, then showers likely with a slight chance of thunderstorms in the afternoon. Much cooler. Humid with highs in the upper 70s. Northwest winds around 5 mph. Chance of rain 90 percent.

Mostly cloudy with a chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. Lows in the mid 60s. Northeast winds around 5 mph. Chance of rain 50 percent.

Patchy fog in the morning. A chance of thunderstorms. Showers likely. Highs in the lower 80s. Southeast winds 5 to 10 mph, becoming southwest in the afternoon. Chance of rain 70 percent.

Mostly cloudy. A chance of showers and thunderstorms in the evening, then a slight chance of showers after midnight. Much cooler with lows in the upper 40s. Northwest winds 15 to 20 mph. Chance of rain 50 percent.

Mostly sunny and breezy. Much cooler with highs in the lower 60s.

Partly cloudy in the evening, then becoming mostly clear. Cooler with lows in the upper 30s.

Clear. Highs in the lower 60s.

Clear. Lows in the upper 30s.

Sunny. Highs around 70.

Partly cloudy. Lows in the upper 40s.

Partly cloudy. Highs in the mid 70s.

Partly cloudy. Lows in the upper 40s.

Mostly sunny. Highs in the upper 70s.

Partly cloudy. Low temperature around 59F. Dew point will be around 55F with an average humidity of 73%. Winds will be 8 mph from the SSE.

Mostly cloudy. High temperature around 77F. Dew point will be around 57F with an average humidity of 62%. Winds will be 10 mph from the SSE.

Cloudy. Low temperature around 61F. Dew point will be around 54F with an average humidity of 67%. Winds will be 8 mph from the SE.

Partly cloudy. High temperature around 78F. Dew point will be around 58F with an average humidity of 61%. Winds will be 14 mph from the SSE.

Cloudy. Low temperature around 56F. Dew point will be around 47F with an average humidity of 67%. Winds will be 8 mph from the NE.