10-Day Weather Forecast - Grafton, IL

Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 106.

Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 70s. Southwest winds around 5 mph in the evening, becoming light and variable. Heat index values up to 104 early in the evening.

Mostly sunny. Hot with highs in the upper 90s. West winds around 5 mph, becoming northwest around 5 mph in the afternoon. Heat index values up to 106.

Mostly clear. Lows around 70. Northeast winds around 5 mph. Heat index values up to 102 early in the evening.

Mostly clear. Highs in the lower 90s.

Mostly clear. Lows in the mid 60s.

Mostly clear. Highs in the lower 90s.

Mostly clear. Lows in the mid 60s.

Mostly clear. Hot. Highs in the upper 90s. Heat index values up to 105.

Mostly clear. Hot. Lows in the mid 70s. Heat index values up to 105.

Mostly clear. Hot. Highs in the upper 90s. Heat index values up to 105.

Partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent.

Partly cloudy. A slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20 percent.

Clear. Low temperature around 75F. Dew point will be around 69F with an average humidity of 71%. Winds will be 3 mph from the S.

Mostly sunny. High temperature around 90F. Dew point will be around 67F with an average humidity of 58%. Winds will be 3 mph from the SW.

Clear. Low temperature around 70F. Dew point will be around 68F with an average humidity of 78%. Winds will be 4 mph from the SE.

Sunny. High temperature around 89F. Dew point will be around 67F with an average humidity of 61%. Winds will be 5 mph from the S.

Clear. Low temperature around 70F. Dew point will be around 67F with an average humidity of 75%. Winds will be 5 mph from the SE.