FPUS43 KIND 190730 City Forecast for Muncie, IN Issued Wednesday morning - Aug 19, 2015 .Wednesday... Thunderstorm, high 80, 80% chance of precipitation. .Wednesday night... Low 60, 80% chance of precipitation. .Thursday... Partly cloudy, high 74, 10% chance of precipitation. .Thursday night... Low 54. .Friday... High 76.