FPUS63 KDMX 200905 SFPIA IAZ001>099-202100- State Forecast for Iowa National Weather Service Des Moines IA 405 AM CDT Fri Mar 20 2026 .TODAY...Mostly sunny. Highs 66 to 80. .TONIGHT...Partly cloudy. Lows 40 to 48. .SATURDAY...Mostly sunny until late afternoon then becoming clear. Highs 76 to 88. .SUNDAY...Partly cloudy. Lows 43 to 55. Highs 52 to 68. .MONDAY...Mostly clear. Lows 28 to 34. Highs 50 to 58. .TUESDAY...Partly cloudy. Lows in the upper 30s. Highs 55 to 61. $$ 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.