| NWS Forecast for: Decatur County Issued by: National Weather Service Des Moines, IA Last Update: 128 AM CDT Thu Sep 17 2026 |  |
Rest Of Tonight: Cloudy with a slight chance of showers and thunderstorms. Areas of dense fog. Some thunderstorms may produce heavy rainfall. Near steady temperature in the upper 60s. East winds around 5 mph. Chance of rain 20 percent. Thursday: Mostly cloudy. A slight chance of showers and thunderstorms in the morning. Areas of dense fog in the morning. Some thunderstorms may produce heavy rainfall in the morning. Humid with highs in the upper 70s. Northeast winds around 5 mph. Chance of rain 20 percent. Thursday Night: Mostly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows in the mid 60s. East winds around 5 mph. Chance of rain 20 percent. Friday: Mostly sunny. A slight chance of showers and thunderstorms in the morning. Humid with highs in the lower 80s. Southeast winds 5 to 10 mph, becoming south with gusts up to 20 mph in the afternoon. Chance of rain 20 percent. Friday Night: Mostly clear in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Humid with lows around 70. South winds 5 to 10 mph. Chance of rain 40 percent. Saturday: Mostly cloudy in the morning, then becoming mostly sunny. A slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the lower 80s. Chance of rain 50 percent. Saturday Night: Showers likely with a chance of thunderstorms. Lows in the lower 60s. Chance of rain 70 percent. Sunday: Showers likely with a chance of thunderstorms. Highs in the upper 60s. Chance of rain 70 percent. Sunday Night: Showers likely. A chance of thunderstorms, mainly in the evening. Lows in the upper 50s. Chance of rain 70 percent. Monday: A slight chance of thunderstorms in the morning. Mostly cloudy with a chance of showers. Highs in the mid 60s. Chance of rain 50 percent. Monday Night: Mostly cloudy with a 20 percent chance of showers. Lows in the mid 50s. Tuesday: Mostly cloudy in the morning, then becoming partly sunny. Highs in the mid 60s. Tuesday Night: Partly cloudy. Lows in the mid 50s. Wednesday: Partly sunny. Highs in the upper 60s. | |
| Zone Forecast: Decatur County | |
Visit your local NWS office at: https://www.weather.gov/desmoines |