The climate in South Africa ranges from desert and semi-desert in the northwest to subtropical on the eastern coast. Rainfall generally occurs during summer, although in the southwest around Cape Town, rainfall occurs in winter (April through early September). Temperatures are influenced by variations in elevation, terrain and ocean currents more than latitude. (MJ Thomas, 2020)
During the dry winter months of April through early September, the days are warm, but the nights can become very cold. (MJ Thomas, 2020)
Mid- to late September through April is a much warmer period, and you will need fewer warm clothes, although you can still expect occasional rain showers. Late October is generally the hottest time of the year, with temperatures often reaching into the 100s° F. (MJ Thomas, 2020)