Depending on which parks you choose to visit, the climate will differ slightly. Lower altitude parks will be hotter but not unbearable at this time of year and of course temperatures will be cooler at higher altitudes. Mornings and evening temperatures will still be fairly cool but they are unlikely to drop much below 10C. It is still worth bringing plenty of layers on safari so you are prepared for any weather conditions.
There will be little, if any, rainfall throughout the month of August which makes it a fantastic time to travel for walking safaris staying in tented camps in South Luangwa National Park