FPUS63 KDMX 210905 SFPIA IAZ001>099-212100- State Forecast for Iowa National Weather Service Des Moines IA 405 AM CDT Thu May 21 2026 .TODAY...Mostly cloudy. Highs 59 to 65. .TONIGHT...Mostly cloudy. Slight chance of showers and thunderstorms. Lows 44 to 50. .FRIDAY...Mostly cloudy. Chance of showers and slight chance of thunderstorms. Highs 61 to 67. .SATURDAY...Partly cloudy. Chance of showers. Lows 47 to 53. Highs 70 to 76. .SUNDAY...Mostly clear. Lows 48 to 54. Highs in the upper 70s. .MEMORIAL DAY...Clear. Lows in the mid 50s. Highs in the mid 80s. $$ 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.