FPUS63 KDMX 172105 SFPIA IAZ001>099-181000- State Forecast for Iowa National Weather Service Des Moines IA 405 PM CDT Sun May 17 2026 .TONIGHT...Partly cloudy early in the evening then becoming mostly cloudy. Chance of thunderstorms. Lows 55 to 69. .MONDAY...Mostly cloudy early in the morning then becoming partly cloudy. Slight chance of thunderstorms. Highs 70 to 86. .MONDAY NIGHT...Partly cloudy early in the evening then becoming cloudy. Showers and chance of thunderstorms. Lows 44 to 60. .TUESDAY...Partly cloudy. Highs 57 to 69. .WEDNESDAY...Mostly clear. Lows 37 to 45. Highs in the lower 60s. .THURSDAY...Partly cloudy. Slight chance of thunderstorms. Lows in the lower 40s. Highs in the mid 60s. .FRIDAY...Partly cloudy. Slight chance of thunderstorms. Lows in the mid 40s. Highs in the lower 70s. $$ This forecast covers all of Iowa and is updated twice daily. Broad ranges in temperature depict high variability across the state. For location specific forecasts, please visit www.weather.gov. Please provide feedback on this product to nws.desmoines@noaa.gov.