What SilentT said.
Not really a bad time to hunt the Limpopo, but September/October is near the end of the dry season, and normally waterholes are fantastic. Foliage is still down at that time, and up to early October high temps are usually in the mid 70`s, with night time lows around 50-55 degree`s.
If you take me with you, I can make it rain there in September. lol