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Crystal Lake, IL 7-Day Night Weather Forecast
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Crystal Lake, IL Weather Forecast
Crystal Lake, IL Weather Forecast Date: 807 PM CST Tue Mar 03 2026
The area/counties/county of: Mchenry, including the cities of: Crystal Lake, Algonquin, Mchenry, and Woodstock.or toggle through each period.
Rest of Tonight... Mostly cloudy. Patchy fog after midnight. Lows around 30. Northeast winds around 5 mph.
Wednesday... Mostly cloudy. Patchy fog early in the morning. A slight chance of rain showers late. Highs in the upper 40s. East winds 5 to 10 mph. Chance of precipitation 20%.
Wednesday Night... Cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Showers likely late. Patchy fog after midnight. Lows in the upper 30s. East winds around 5 mph. Chance of precipitation 60%.
Thursday... Cloudy. Patchy fog in the morning. Showers likely, mainly in the morning. Highs in the upper 40s. Northeast winds around 5 mph. Chance of precipitation 70%.
Thursday Night... Mostly cloudy. A slight chance of showers. Lows around 40. East winds around 5 mph. Chance of precipitation 20%.
Friday... Showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 60s. Chance of precipitation near 100%.
Friday Night... A slight chance of thunderstorms. Showers. Lows in the upper 40s. Chance of precipitation 90%.
Saturday... Mostly cloudy. A slight chance of showers in the morning. Highs around 60. Chance of precipitation 20%.
Saturday Night... Partly cloudy in the evening, then becoming mostly clear. Lows in the mid 30s.
Sunday... Partly cloudy in the morning, then clearing. Breezy with highs in the lower 60s.
Sunday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 40s.
Monday... Partly cloudy in the morning, then clearing. Highs in the mid 60s.
Monday Night... Mostly clear. Lows in the upper 40s.
POP = Probability of Precipitation
Crystal Lake Radar Loop
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