10-Day Weather Forecast - McHenry, IL

Partly cloudy in the morning, then clearing. A slight chance of showers and thunderstorms in the morning. Hot, humid with highs in the lower 90s. South winds 5 to 10 mph, becoming southwest in the afternoon. Chance of precipitation 20 percent. Heat index values up to 105.

Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of showers and thunderstorms. Humid with lows around 70. West winds around 5 mph. Chance of precipitation 20 percent.

Partly cloudy. Humid with highs in the mid 80s. North winds 5 to 10 mph.

Partly cloudy. Lows in the mid 60s. Northeast winds 5 to 10 mph.

Partly cloudy. Highs in the lower 80s.

Partly cloudy. Lows in the lower 60s.

Partly cloudy. Highs in the lower 80s.

Mostly cloudy. Lows in the mid 60s.

Mostly cloudy. Highs in the lower 80s.

Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers after midnight. Lows around 70. Chance of precipitation 50 percent.

Mostly cloudy. Highs in the mid 80s.

Mostly cloudy. A chance of showers after midnight. Lows in the mid 60s. Chance of precipitation 40 percent.

Mostly cloudy. Highs in the lower 80s.

Clear. Low temperature around 65F. Dew point will be around 65F with an average humidity of 88%. Winds will be 2 mph from the N.

Mostly sunny. High temperature around 77F. Dew point will be around 64F with an average humidity of 75%. Winds will be 1 mph from the NE.

Mostly clear. Low temperature around 64F. Dew point will be around 64F with an average humidity of 88%. Winds will be 2 mph from the SE.

Sunny with a slight chance of rain. Chance of precipitation 25%. High temperature around 79F. Dew point will be around 65F with an average humidity of 72%. Winds will be 3 mph from the S.

Mostly clear. Low temperature around 66F. Dew point will be around 65F with an average humidity of 86%. Winds will be 3 mph from the S.