Generally speaking, rain falls mostly during the summer months, often in the form of thunderstorms. Winter is the dry season. Annual rainfall is highest on the Highveld in the West, between 1,000 and 2,000 mm (39.4 and 78.7 in) depending on the year. 

The further East, the less rain, with the Lowveld recording 500 to 900 mm (19.7 to 35.4 in) per annum. Variations in temperature are also related to the altitude of the different regions. The Highveld temperature is temperate and, seldom, uncomfortably hot while the Lowveld may record temperatures around 40 °C (104 °F) in summer.