| NWS Forecast for: McHenry County Issued by: National Weather Service Chicago, IL Last Update: 247 AM CDT Sat Apr 25 2026 | |
| Today: Mostly cloudy in the morning then clearing. Highs in the mid 60s. Northeast winds 10 to 20 mph. Tonight: Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 40s. Northeast winds 10 to 15 mph, becoming east around 5 mph after midnight. Sunday: Partly cloudy. Highs in the mid 60s. East winds 5 to 10 mph, increasing to 10 to 15 mph in the afternoon. Sunday Night: Mostly cloudy. Lows around 50. East winds 10 to 15 mph. Gusts up to 25 mph after midnight. Monday: Mostly cloudy. A chance of showers and thunderstorms in the morning, then showers and thunderstorms likely in the afternoon. Some thunderstorms may be severe in the afternoon. Locally heavy rainfall possible in the afternoon. Breezy with highs around 70. Southeast winds 15 to 20 mph with gusts up to 30 mph. Chance of precipitation 70 percent. Monday Night: Mostly cloudy. Showers and thunderstorms in the evening, then a slight chance of showers after midnight. Some thunderstorms may be severe. Locally heavy rainfall possible in the evening. Breezy with lows in the upper 40s. Chance of precipitation 90 percent. Tuesday: Mostly cloudy. Highs in the lower 60s. Tuesday Night: Mostly cloudy. Lows in the lower 40s. Wednesday: Partly cloudy. Highs in the upper 50s. Wednesday Night: Partly cloudy. Lows in the upper 30s. Thursday: Partly cloudy in the morning, then becoming mostly cloudy. Highs in the upper 50s. Thursday Night: Mostly cloudy in the evening, then becoming partly cloudy. Lows in the upper 30s. Friday: Partly cloudy in the morning, then becoming mostly cloudy. Highs in the upper 50s. | |
| Zone Forecast: McHenry County | |
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