FPUS63 KDMX 190901 SFPIA IAZ001>099-192100- State Forecast for Iowa National Weather Service Des Moines IA 401 AM CDT Tue Aug 19 2025 .TODAY...Partly cloudy. Patchy fog. Highs 82 to 88. .TONIGHT...Mostly clear. Lows in the mid 60s. .WEDNESDAY...Mostly clear until late afternoon then clearing. Patchy dense fog. Highs in the mid 80s. .THURSDAY...Clear. Lows in the lower 60s. Highs 79 to 85. .FRIDAY...Mostly clear. Slight chance of thunderstorms. Lows in the lower 60s. Highs 81 to 87. .SATURDAY...Clear. Chance of thunderstorms. Lows 55 to 61. Highs 74 to 80. $$ 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.