A summer rainfall area, Gauteng experiences hot summer days that often result in short but intense afternoon thunderstorms, commonly accompanied by thunder and lightning. Summers nights are also hot. The real-time Irene radar map  provided by the South African weather service is a great tool to help you plan any afternoon outdoor activity in summer. It gives ample warning of any approaching thunder storms. Winter is dry and cold with temperatures dropping to a little above freezing at night, however, winter days are beautiful with comfortable temperatures.