Johannesburg enjoys a very favourable climate, dry and sunny all year round. Between October and April the city experiences heavy afternoon thunderstorms with downpours of rain that disappear as quickly as they arrive. Winter days are only slightly cooler than the pleasant summer average temperatures, but it can become frosty on winter nights The climate of Johannesburg might be described as perfect, with warm, sunny days all year round. Rain occurs only in summer, during the late afternoons, in the form of thunderstorms, providing short downpours to water the lush greenery of the city suburbs. Winters are dry and mild, the days sunny and warm, but it can become freezing at night, resulting in clear, bright frosty mornings.