FPUS63 KDMX 202106 SFPIA IAZ001>099-211000- State Forecast for Iowa National Weather Service Des Moines IA 405 PM CDT Mon Apr 20 2026 .TONIGHT...Mostly clear. Lows 46 to 54. .TUESDAY...Sunny. Highs 76 to 82. .TUESDAY NIGHT...Clear. Lows 48 to 56. .WEDNESDAY...Clear. Highs 77 to 83. .THURSDAY...Partly cloudy. Chance of thunderstorms. Lows in the upper 50s. Highs 73 to 79. .FRIDAY...Partly cloudy. Slight chance of thunderstorms. Lows 41 to 53. Highs in the mid 60s. .SATURDAY...Partly cloudy. Slight chance of showers. Lows 38 to 44. Highs 55 to 63. $$ 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.