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Willis, IL Weather Forecast
Willis, IL Weather Forecast Date: 156 AM CDT Tue Oct 27 2026
The area/counties/county of: De Kalb, including the cities of: Dekalb and Sycamore.or toggle through each period.
Rest of Tonight... Mostly cloudy. Patchy fog. Near steady temperature in the upper 40s. East winds around 5 mph.
Tuesday... Mostly cloudy. Highs around 70. Southeast winds 5 to 10 mph.
Tuesday Night... Mostly cloudy. Lows in the lower 50s. South winds around 5 mph.
Wednesday... Partly cloudy in the morning, then clearing. Highs in the lower 70s. South winds 5 to 10 mph.
Wednesday Night... Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the mid 50s. South winds 5 to 10 mph. Chance of precipitation 20%.
Thursday... Mostly cloudy with a 30% chance of showers. Highs in the mid 70s.
Thursday Night... Mostly cloudy in the evening, then becoming partly cloudy. Lows in the upper 40s.
Friday... Mostly cloudy. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs around 70. Chance of precipitation 40%.
Friday Night... Cloudy with a chance of showers. Lows in the lower 50s. Chance of precipitation 50%.
Saturday... Mostly cloudy. A chance of showers in the morning. Highs around 70. Chance of precipitation 40%.
Saturday Night... Mostly cloudy with a 50% chance of showers. Lows in the lower 50s.
Sunday... Mostly cloudy with a 40% chance of showers. Highs around 70.
Sunday Night... Mostly cloudy. Lows in the lower 50s.
POP = Probability of Precipitation
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