FPUS44 KOUN 061804 City Forecast for Lawton, OK Issued Saturday afternoon - Jun 6, 2015 .Saturday night... Low 68, 0% chance of precipitation. .Sunday... Sunny, high 92, 0% chance of precipitation. .Sunday night... Low 68, 5% chance of precipitation. .Monday... Partly cloudy, high 91. .Monday night... Low 68.