FPUS63 KDMX 210905 SFPIA IAZ001>099-212100- State Forecast for Iowa National Weather Service Des Moines IA 405 AM CDT Sat Mar 21 2026 .TODAY...Sunny. Highs 80 to 90. .TONIGHT...Clear. Lows 40 to 52. .SUNDAY...Partly cloudy until late afternoon then clearing. Highs 48 to 60. .MONDAY...Partly cloudy. Lows 27 to 33. Highs 50 to 56. .TUESDAY...Partly cloudy. Lows in the upper 30s. Highs 59 to 65. .WEDNESDAY...Partly cloudy. Slight chance of rain. Lows 38 to 44. Highs 59 to 73. $$ 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.