| NWS Forecast for: De Kalb County Issued by: National Weather Service Chicago, IL Last Update: 121 AM CDT Fri Sep 18 2026 |  |
Rest Of Tonight: Cloudy. Near steady temperature in the mid 60s. Northeast winds 5 to 10 mph. Friday: Mostly cloudy. A slight chance of showers early in the afternoon. Highs in the lower 70s. East winds 10 to 15 mph. Chance of precipitation 20 percent. Friday Night: Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then showers with thunderstorms likely after midnight. Lows around 60. East winds 10 to 15 mph. Chance of precipitation 90 percent. Saturday: Thunderstorms likely in the morning. Showers. A slight chance of thunderstorms in the afternoon. Humid with highs in the mid 70s. Southeast winds 10 to 15 mph, becoming south 5 to 10 mph in the afternoon. Chance of precipitation near 100 percent. Saturday Night: Showers with a chance of thunderstorms. Lows in the lower 60s. Northeast winds 5 to 10 mph. Chance of precipitation 90 percent. Sunday: Mostly cloudy with a slight chance of thunderstorms. Showers likely, mainly in the morning. Highs in the upper 60s. Chance of precipitation 70 percent. Sunday Night: Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the lower 50s. Chance of precipitation 50 percent. Monday: Mostly cloudy. Showers likely, mainly in the morning. Highs in the lower 60s. Chance of precipitation 60 percent. Monday Night: Mostly cloudy with a 40 percent chance of showers. Lows in the upper 40s. Tuesday: Mostly cloudy. Highs in the lower 60s. Tuesday Night: Mostly cloudy in the evening, then becoming partly cloudy. Lows in the upper 40s. Wednesday: Partly cloudy in the morning, then becoming mostly cloudy. Highs in the mid 60s. Wednesday Night: Mostly cloudy. Lows in the upper 40s. Thursday: Mostly cloudy. Highs in the upper 60s. | |
| Zone Forecast: De Kalb County | |
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