| NWS Forecast for: McHenry County Issued by: National Weather Service Chicago, IL Last Update: 337 AM CDT Tue Jun 9 2026 | |
Today: Mostly cloudy in the morning, then becoming partly cloudy. A slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 80s. West winds 5 to 10 mph. Chance of precipitation 20 percent. Tonight: Partly cloudy. A chance of showers and thunderstorms after midnight. Lows in the upper 60s. North winds around 5 mph, becoming south after midnight. Chance of precipitation 40 percent. Wednesday: Mostly cloudy in the morning, then becoming partly cloudy. A slight chance of showers and thunderstorms early in the morning. A chance of showers and thunderstorms in the afternoon. Breezy with highs in the lower 90s. South winds 10 to 15 mph, increasing to southwest 15 to 20 mph in the afternoon. Gusts up to 30 mph. Chance of precipitation 50 percent. Heat index values up to 100. Wednesday Night: Partly cloudy in the evening, then becoming mostly cloudy. Showers and thunderstorms likely, mainly in the evening. Breezy with lows around 70. Southwest winds 15 to 20 mph with gusts up to 30 mph, diminishing to 10 to 15 mph after midnight. Chance of precipitation 70 percent. Thursday: Mostly cloudy. A chance of showers and thunderstorms in the morning, then showers and thunderstorms in the afternoon. Highs in the upper 80s. Southwest winds 5 to 10 mph, increasing to 15 to 20 mph with gusts up to 25 mph in the afternoon. Chance of precipitation 90 percent. Thursday Night: Mostly cloudy with showers and thunderstorms in the evening, then partly cloudy after midnight. Lows around 60. Chance of precipitation 80 percent. Friday: Mostly sunny. Highs in the upper 70s. Friday Night: Clear. Lows around 60. Saturday: Mostly sunny in the morning, then becoming partly cloudy. Highs in the lower 80s. Saturday Night: Mostly clear with a chance of showers in the evening, then partly cloudy after midnight. Lows in the upper 50s. Chance of precipitation 30 percent. Sunday: Mostly cloudy. Highs in the mid 70s. Sunday Night: Partly cloudy. Lows in the mid 50s. Monday: Partly cloudy. A chance of showers in the afternoon. Highs in the mid 70s. Chance of precipitation 30 percent. | |
| Zone Forecast: McHenry County | |
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