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Spring Grove, IL Weather Forecast
Spring Grove, IL Weather Forecast Date: 321 PM CDT Sat Sep 12 2026
The area/counties/county of: Mchenry, including the cities of: Crystal Lake, Algonquin, Mchenry, and Woodstock.or toggle through each period.
Late This Afternoon... Mostly cloudy. A chance of sprinkles. Temperatures in the lower 80s. West winds 10 to 15 mph.
Tonight... Partly cloudy in the evening, then becoming mostly clear. Less humid. Lows in the mid 50s. Northwest winds 5 to 10 mph.
Sunday... Mostly cloudy. A chance of showers in the afternoon. Highs in the lower 70s. Northwest winds 5 to 10 mph. Chance of precipitation 40%.
Sunday Night... Mostly clear. Lows in the upper 40s. Northwest winds around 5 mph in the evening, becoming light and variable.
Monday... Mostly sunny in the morning, then becoming mostly cloudy. Highs in the lower 70s. East winds 5 to 10 mph, increasing to southeast 10 to 15 mph in the afternoon.
Monday Night... Mostly cloudy. A chance of showers with a slight chance of thunderstorms after midnight. Breezy and not as cool with lows in the lower 60s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of precipitation 50%.
Tuesday... Showers likely. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of precipitation 70%.
Tuesday Night... A chance of showers and thunderstorms in the evening, then showers likely with a slight chance of thunderstorms after midnight. Lows in the lower 60s. Chance of precipitation 70%.
Wednesday... Showers. Highs in the lower 70s. Chance of precipitation 80%.
Wednesday Night... Showers likely. Lows in the lower 60s. Chance of precipitation 70%.
Thursday... Showers likely in the morning. Highs in the mid 70s. Chance of precipitation 70%.
Thursday Night... Mostly cloudy. A chance of showers after midnight. Lows in the upper 50s. Chance of precipitation 30%.
Friday... Mostly cloudy with a 40% chance of showers. Highs in the mid 70s.
Friday Night... Mostly cloudy with a chance of showers. Lows in the mid 50s. Chance of precipitation 40%.
POP = Probability of Precipitation
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