Weather World
City of McHenry, ILMcHenry, IL 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
McHenry, IL Weather Forecast
McHenry, IL Weather Forecast Date: 1141 PM CDT Fri Sep 04 2026
The area/counties/county of: Mchenry, including the cities of: Crystal Lake, Algonquin, Mchenry, and Woodstock.or toggle through each period.
Overnight... Partly cloudy. A chance of showers and thunderstorms late in the evening. Patchy fog late. Lows in the lower 70s. Northeast winds around 5 mph. Chance of precipitation 50%.
Saturday... Mostly cloudy in the morning, then becoming partly cloudy. Patchy fog early in the morning. Humid with highs in the lower 80s. Northeast winds 5 to 10 mph.
Saturday Night... Partly cloudy. Lows in the lower 60s. Northeast winds 5 to 10 mph.
Sunday... Partly cloudy. Highs around 80. East winds around 5 mph, increasing to around 10 mph in the afternoon.
Sunday Night... Partly cloudy in the evening, then becoming mostly clear. Lows around 60. East winds around 5 mph.
Labor Day... Partly cloudy. Highs in the lower 80s.
Monday Night... Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 60s.
Tuesday... Mostly cloudy. Highs in the mid 80s.
Tuesday Night... Partly cloudy. A chance of showers and thunderstorms after midnight. Lows around 70. Chance of precipitation 50%.
Wednesday... Mostly cloudy in the morning, then becoming partly cloudy. Highs in the upper 80s.
Wednesday Night... Mostly cloudy in the evening, then clearing. Lows in the mid 60s.
Thursday... Partly cloudy. Highs in the upper 70s.
Thursday Night... Partly cloudy. Lows in the upper 50s.
POP = Probability of Precipitation
McHenry Radar Loop
Use the map search tool if you want to place a location marker on the radar map...