When to Go
The temperatures will vary depending on the season and region. For instance, it's cold and wet in Cape Town, South Africa in August, but cool in Arusha, Tanzania. It is hot and humid in Dar-Es-Salaam in January while the weather in Johannesburg is pleasantly warm and tolerable.
Below is a temperature chart which will help you pack. Just remember that no matter how hot it is, it's always advisable to carry a pair of long slacks and a long sleeved shirt accompanied by a light (yet warm) jacket as the African bush is cool in the early mornings and at night.