| NWS Forecast for: Grundy County Issued by: National Weather Service Des Moines, IA Last Update: 303 PM CDT Sun Aug 2 2026 |  |
| Tonight: Mostly clear. Lows in the upper 50s. Northeast winds around 5 mph, becoming southeast after midnight. Monday: Sunny. Highs in the lower 80s. Southeast winds 5 to 10 mph. Monday Night: Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 60s. South winds 5 to 10 mph. Tuesday: Mostly sunny. A chance of showers with a slight chance of thunderstorms in the afternoon. Humid with highs in the lower 80s. South winds 5 to 10 mph, becoming west in the afternoon. Chance of rain 40 percent. Tuesday Night: A chance of thunderstorms. Showers. Lows around 60. Northeast winds 5 to 10 mph. Chance of rain 90 percent. Wednesday: Showers likely with a chance of thunderstorms in the morning, then showers likely with a slight chance of thunderstorms in the afternoon. Highs in the mid 70s. Chance of rain 70 percent. Wednesday Night: Mostly cloudy with a chance of showers in the evening, then partly cloudy with a slight chance of showers after midnight. Lows in the mid 50s. Chance of rain 40 percent. Thursday: Mostly sunny. Highs around 80. Thursday Night: Mostly clear. Lows in the upper 50s. Friday: Mostly sunny. Highs in the lower 80s. Friday Night: Mostly clear. A slight chance of showers after midnight. Lows in the lower 60s. Chance of rain 20 percent. Saturday: Mostly sunny. Highs in the mid 80s. Saturday Night: Mostly clear in the evening, then becoming partly cloudy. A slight chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 20 percent. Sunday: Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the mid 80s. Chance of rain 20 percent. | |
| Zone Forecast: Grundy County | |
Visit your local NWS office at: https://www.weather.gov/desmoines |