| NWS Forecast for: Grundy County Issued by: National Weather Service Chicago, IL Last Update: 719 PM CDT Thu Jul 9 2026 |  |
Rest Of Tonight: Mostly cloudy in the evening, then becoming partly cloudy. Scattered showers and thunderstorms in the evening. Isolated showers and thunderstorms after midnight. Areas of fog late. Lows around 70. West winds around 5 mph, becoming north after midnight. Chance of precipitation 40 percent. Friday: Mostly cloudy. Patchy fog early in the morning. Scattered showers and thunderstorms early in the afternoon. Isolated showers and thunderstorms late. Humid with highs in the mid 80s. Northeast winds around 5 mph. Chance of precipitation 40 percent. Friday Night: Mostly cloudy. Lows in the lower 60s. Northeast winds around 5 mph. Saturday: Mostly cloudy in the morning, then becoming partly cloudy. Highs in the mid 80s. Northeast winds around 5 mph. Saturday Night: Partly cloudy in the evening, then clearing. Lows in the mid 60s. Northeast winds around 5 mph. Sunday: Mostly sunny. Highs in the mid 80s. Sunday Night: Clear. Lows in the mid 60s. Monday: Sunny. Highs in the upper 80s. Monday Night: Clear. Lows in the upper 60s. Tuesday: Mostly sunny. Highs in the upper 80s. Tuesday Night: Mostly clear. Lows around 70. Wednesday: Mostly sunny in the morning, then becoming partly cloudy. Highs in the upper 80s. Wednesday Night: Mostly clear. Lows around 70. Thursday: Mostly sunny. Highs in the upper 80s. | |
| Zone Forecast: Grundy County | |
Visit your local NWS office at: https://www.weather.gov/lot |