FPUS44 KTSA 061202 City Forecast for Fayetteville, AR Issued Wednesday morning - Oct 6, 2021 .Wednesday... Partly cloudy, high 75, 40% chance of precipitation. .Wednesday night... Low 54, 5% chance of precipitation. .Thursday... Partly cloudy, high 81, 5% chance of precipitation. .Thursday night... Low 57. .Friday... High 87.