Here is the forecast for the Iowa State Fair in Des Moines for the last day of the State Fair, Sunday August 17th. There are fewer forecasts due to time and internet issues.

NWS Sunny High 86°
WX Underground Sunny High 85°
WHO-TV Partly Cloudy High 85°
AccuWeather Partly Cloudy High 85°

Iowa WX Blog’s Forecast Sunny High 85° A light and variable wind.