Direct from the National Weather Service

The Lake County IL 7 Day Weather Forecast

Tonight
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Cloudy early in the evening then becoming partly cloudy. Lows in the mid 20s. West winds 10 to 15 miles per hour in the evening becoming southwest and decreasing to around 5 miles per hour after midnight.
Thursday
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Partly sunny. Highs in the upper 30s. Southeast winds 5 to 10 miles per hour.
Thursday Night
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Light rain. Temperatures nearly steady in the mid 30s. Southeast winds around 5 miles per hour in the evening shifting to the north after midnight. Chance of precipitation 80 percent.
Friday
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Partly sunny. A 30 percent chance of light rain in the morning. Highs in the lower 40s. North winds 5 to 10 miles per hour.
Friday Night
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Partly cloudy in the evening then clearing. Lows around 30. North winds 5 to 10 miles per hour.
Saturday
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Mostly sunny. Slight chance of light rain and light freezing rain in the morning, then a slight chance of light rain in the afternoon. Highs around 40. Chance of precipitation 20 percent.
Saturday Night
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Clear. Lows in the upper 20s.
Sunday
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Mostly sunny in the morning then becoming partly cloudy. Highs in the lower 40s.
Sunday Night Through Tuesday Night
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Partly cloudy. Lows in the upper 20s. Highs in the upper 30s.
Wednesday
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Partly sunny. Highs around 40.