Temperatures are moderate by altitude, in the Highveld they range is between 22°C - 24°C of the hottest month (January) and 12°C - 13°C of the colder one (July). Very hot and humid are the valleys of the Zambezi and Limpopo rivers, where the maximum temperature in summer (December-February) vary between 32°C and 38°C, as well as the areas towards the depression of the Kalahari. Extreme are the temperature ranges between day and night, often at night the temperature can go below freezing. 

The best time to travel are the more dry and less humid  winter months between May and October.