The climate of Pakistan varies widely, with sharp differences between the high mountains and low plains. The country experiences four seasons. In the mountainous regions of the north and west, temperatures fall below freezing during winter and are mild during summer. In the Indus plains, temperatures range between about 32° and 49°C (about 90° and 120°F) in summer, and the average in winter is about 13°C (about 55°F).

Mountainous areas receive most precipitation as heavy snowfall in winter. In other areas of Pakistan, most precipitation comes with the summer monsoons during July and August. The summer monsoons are seasonal winds that bring torrential rainfall, breaking the hot, dry spell and providing much-needed relief. The rainfall is so heavy that it causes rivers in Punjab and Sind provinces to flood the lowland areas. Rainfall is scarce the rest of the year. Punjab Province has the most precipitation in the country, receiving more than 500 mm (20 in) per year. In contrast, the arid regions of the southeast (the Thar Desert in Sind) and southwest (Baluchistan) receive less than 125 mm (5 in) annually.