| NWS Forecast for: Grundy County Issued by: National Weather Service Des Moines, IA Last Update: 408 AM CDT Fri Jun 5 2026 |  |
Today: Cloudy with a chance of showers and thunderstorms early, then mostly cloudy with a slight chance of showers and thunderstorms this morning. Partly sunny this afternoon. Some thunderstorms may produce heavy rainfall early this morning. Humid with highs in the mid 80s. South winds around 5 mph, becoming west. Chance of rain 40 percent. Tonight: Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers and thunderstorms. Humid with lows in the lower 60s. Southwest winds 5 to 10 mph. Chance of rain 40 percent. Saturday: Mostly sunny. Humid with highs in the mid 80s. West winds around 5 mph, becoming southeast around 5 mph in the afternoon. Saturday Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Humid with lows in the mid 60s. Southeast winds around 5 mph. Chance of rain 40 percent. Sunday: Mostly cloudy. Showers likely with a chance of thunderstorms in the afternoon. Humid with highs in the mid 80s. Southeast winds 10 to 15 mph. Chance of rain 70 percent. Sunday Night: Showers with a chance of thunderstorms. Lows in the mid 60s. Chance of rain 90 percent. Monday: Showers likely with a chance of thunderstorms. Highs in the mid 80s. Chance of rain 70 percent. Monday Night: Mostly cloudy with a chance of showers and thunderstorms. Lows in the mid 60s. Chance of rain 50 percent. Tuesday: Partly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent. Tuesday Night: Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows around 70. Chance of rain 20 percent. Wednesday: Sunny. Highs in the mid 90s. Heat index values up to 105. Wednesday Night: Mostly clear. Lows in the lower 70s. Heat index values up to 105 early in the evening. Thursday: Sunny, hot with highs in the mid 90s. Heat index values up to 110. | |
| Zone Forecast: Grundy County | |
Visit your local NWS office at: https://www.weather.gov/desmoines |