| NWS Forecast for: Winnebago County Issued by: National Weather Service Chicago, IL Last Update: 556 AM CDT Wed Sep 2 2026 |  |
Today: Partly cloudy. Hot. Highs in the lower 90s. Southwest winds 5 to 10 mph, increasing to 10 to 15 mph in the afternoon. Heat index values up to 102. Tonight: Partly cloudy. A slight chance of showers and thunderstorms in the late evening and early morning. A chance of showers and thunderstorms late. Humid with lows in the lower 70s. South winds around 5 mph. Chance of precipitation 30 percent. Thursday: Mostly cloudy. A chance of showers and thunderstorms. Humid with highs in the upper 80s. Southwest winds around 5 mph, becoming southeast in the afternoon. Chance of precipitation 40 percent. Thursday Night: Partly cloudy. A chance of showers and thunderstorms after midnight. Humid with lows in the lower 70s. Southeast winds around 5 mph. Chance of precipitation 50 percent. Friday: Mostly cloudy in the morning, then becoming partly cloudy. A chance of showers and thunderstorms in the morning. Humid with highs in the upper 80s. Southeast winds around 5 mph. Chance of precipitation 50 percent. Friday Night: Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows around 70. Chance of precipitation 50 percent. Saturday: Mostly cloudy with a chance of showers and thunderstorms in the morning, then partly cloudy with a slight chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Chance of precipitation 30 percent. Saturday Night: Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the mid 60s. Chance of precipitation 20 percent. Sunday: Mostly cloudy. Highs in the mid 80s. Sunday Night: Partly cloudy. A chance of showers after midnight. Lows in the lower 60s. Chance of precipitation 30 percent. Labor Day: A chance of showers in the morning. Mostly cloudy. Highs in the lower 80s. Chance of precipitation 30 percent. Monday Night: Mostly cloudy. Lows in the lower 60s. Tuesday: Mostly cloudy. Highs in the lower 80s. | |
| Zone Forecast: Winnebago County | |
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