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Olson Park, IL Weather Forecast
Olson Park, IL Weather Forecast Date: 756 PM CST Fri Nov 13 2026
The area/counties/county of: Mchenry, including the cities of: Crystal Lake, Algonquin, Mchenry, and Woodstock.or toggle through each period.
Tonight... Mostly clear. Lows in the upper 20s. North winds 5 to 10 mph.
Saturday... Sunny. Highs in the mid 40s. Northwest winds 5 to 10 mph.
Saturday Night... Clear. Lows in the upper 20s. North winds around 5 mph in the evening, becoming light and variable.
Sunday... Sunny. Highs in the upper 40s. Light and variable winds.
Sunday Night... Clear. Lows in the upper 20s. Light and variable winds.
Monday... Sunny. Highs around 50.
Monday Night... Clear. Lows in the upper 20s.
Tuesday... Sunny. Highs in the mid 50s.
Tuesday Night... Mostly clear. Lows in the lower 30s.
Wednesday... Mostly sunny in the morning, then becoming partly cloudy. Highs in the mid 50s.
Wednesday Night... Partly cloudy. Lows in the lower 40s.
Thursday... Mostly cloudy. Highs in the upper 50s.
Thursday Night... Partly cloudy. Lows in the mid 40s.
POP = Probability of Precipitation
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