This is the forecast for the Iowa State Fair for Thursday August 20th.

NWS: Mostly Cloudy, 30% chance of showers and thunderstorms, 74° WNW wind 13-17mph gusting to 25mph.
WX Underground: Mostly cloudy with a chance of showers and isolated thunderstorms. Breezy. 74° West wind 10 to 20 mph. Chance of precipitation 30 percent.
WHO-TV: Mostly Cloudy with Showers 73°
KCCI-TV: Mostly Cloudy, Windy and Much Cooler with scattered Showers and Thunderstorms 74° Winds WNW 15-25mph
ABC5: Mostly Cloudy, with Showers/Drizzle and Windy 73°

Grade: C-/D+ It will be windy with scattered showers and storms off and on. If going to the fair, you may have to duck in and out of buildings during these brief showers that are forecast.