The purpose of this study was to determine heating and cooling degree-hours for Turkey. Seventy seven weather stations around in Turkey were chosen for this study. Hourly temperature records obtained from these stations were used to calculate yearly heating degree-hours with base temperatures of 15, 17 and 18.3°C and yearly cooling degree-hours with base temperatures of 24, 26, 27 and 30°C. The degree-hour performances are documented by tables and contour maps.