| NWS Forecast for: Winnebago County Issued by: National Weather Service Chicago, IL Last Update: 720 PM CDT Mon Aug 31 2026 | |
Tonight: Mostly cloudy in the evening, then becoming partly cloudy. Isolated showers and a slight chance of thunderstorms early in the evening. Lows in the lower 70s. Southwest winds around 5 mph. Chance of precipitation 20 percent. Tuesday: Mostly cloudy in the morning, then becoming partly cloudy. A chance of showers and thunderstorms in the afternoon. Humid with highs around 90. Southwest winds 5 to 10 mph, increasing to 10 to 15 mph in the afternoon. Chance of precipitation 30 percent. Tuesday Night: Partly cloudy in the evening, then clearing. Humid with lows in the lower 70s. Southwest winds around 5 mph. Wednesday: Partly cloudy in the morning, then becoming mostly sunny. Humid with highs around 90. Southwest winds 5 to 10 mph, increasing to 10 to 15 mph in the afternoon. Heat index values up to 100. Wednesday Night: Mostly clear in the evening, then becoming partly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows in the lower 70s. Southwest winds around 5 mph. Chance of precipitation 20 percent. Thursday: Mostly cloudy. A chance of showers and thunderstorms in the morning. Highs in the mid 80s. Chance of precipitation 50 percent. Thursday Night: Partly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of precipitation 50 percent. Friday: Mostly cloudy in the morning, then becoming partly cloudy. A slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of precipitation 20 percent. Friday Night: Partly cloudy. A chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of precipitation 40 percent. Saturday: Partly cloudy. Highs in the mid 80s. Saturday Night: Partly cloudy. Lows in the mid 60s. Sunday: Partly cloudy. Highs in the lower 80s. Sunday Night: Partly cloudy. Lows in the lower 60s. Labor Day: Mostly cloudy in the morning, then becoming partly cloudy. Highs in the lower 80s. | |
| Zone Forecast: Winnebago County | |
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