In general, the climate during Africa's dry season is as near perfect as you can get. Similar to North America in early fall, sunny blue skies and overall low humidity are the norm. Daytime temperatures can range from 70-80 F and night time temperatures cool down to 50-60 F.
The dry season in southern Africa starts in April and runs through October. The green or summer season begins in November and runs through March. During this period it can get warm during the day but temperatures cool down before sunset and southern African summer nights are very comfortable. There can be short and sporadic rains during this period. Southern Africa is a year-round destination because of its temperate climate and its green season offers excellent value.
In east Africa, climate variations are determined by altitude, but in essence the area is dry except for the months of April and May when the long rains come and many East Africa safari lodges close for these two months. November can bring short rains. The Rift Valley and Kenya's Central Highlands have a pleasant climate, averaging about 70 F with cool nights. June and July are the coolest months in east Africa. Temperatures can be very chilly at night and early morning especially in areas of high elevation such as the Ngorongoro Crater and the Laikipia Plateau.