The Ras Koh Hills lie in an arid zone, which is outside the monsoon belt. The Ras Koh Hills receive scanty and irregular rainfall (an average of 4 inches annually). The temperature is extreme: very hot in summer and very cold in winter. The average minimum temperature is 2.4 °C (36.3 °F) in January and the average maximum temperature is 42.5 °C (108.5 °F) in July.