The district has a tropical desert climate. In summer, when it is too hot during day time, the nights are remarkably cooler. April, May and June are the hottest months during the day. December, January and February are the coldest months. The mean maximum and minimum temperature during this period are 28C and 9C respectively. There are wide fluctuations in the amount of rain fall from year to year and the yearly average for some areas is as low as 100 mm. Most of the rain falls between July and September, during the south -west monsoon, and is often concentrated in a period of two to three days