| NWS Forecast for: De Kalb County Issued by: National Weather Service Chicago, IL Last Update: 705 AM CDT Thu Aug 13 2026 | |
Today: Mostly cloudy. Widespread dense fog early in the morning. A chance of showers and a slight chance of thunderstorms late in the morning. Showers likely and a chance of thunderstorms in the afternoon. Highs in the upper 70s. East winds 5 to 10 mph. Chance of precipitation 70 percent. Tonight: A chance of thunderstorms until early morning. Showers likely. A slight chance of thunderstorms late. Some thunderstorms may produce heavy rainfall until early morning. Some thunderstorms may produce heavy rainfall late. Humid with lows in the mid 60s. East winds 5 to 10 mph. Chance of precipitation 70 percent. Friday: Mostly cloudy. Showers likely with a slight chance of thunderstorms in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall early in the morning. Humid with highs around 80. East winds 5 to 10 mph. Chance of precipitation 70 percent. Friday Night: Mostly cloudy. A chance of showers in the evening. A chance of thunderstorms. Showers likely after midnight. Humid with lows in the upper 60s. East winds 5 to 10 mph. Chance of precipitation 70 percent. Saturday: Mostly cloudy. Showers likely with a chance of thunderstorms in the morning, then a slight chance of showers and thunderstorms in the afternoon. Humid with highs in the mid 80s. Southeast winds around 10 mph, becoming southwest in the afternoon. Chance of precipitation 70 percent. Saturday Night: Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Lows in the lower 70s. Chance of precipitation 60 percent. Sunday: Mostly cloudy. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of precipitation 50 percent. Sunday Night: Mostly cloudy with a slight chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the mid 60s. Chance of precipitation 20 percent. Monday: Partly cloudy. Highs in the upper 70s. Monday Night: Mostly clear. Lows in the upper 50s. Tuesday: Partly cloudy. Highs in the upper 70s. Tuesday Night: Partly cloudy with a chance of showers. Lows in the lower 60s. Chance of precipitation 30 percent. Wednesday: A chance of showers in the morning. Mostly cloudy. Highs around 80. Chance of precipitation 30 percent. | |
| Zone Forecast: De Kalb County | |
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