Temperatures will vary depending on where you travel in Zimbabwe but parks at lower altitudes such as Gonarezou may be particularly hot with daytime temperatures hitting 30+ degrees. The benefit of these parks is that morning and night-time temperatures will also be warmer so even early game drives will be comfortable.
The water levels of Victoria Falls will be noticeably lower than earlier in the season and depending how dry it has been it may be down just a small flow. However, without the spray of the falls (as is the case in the wet season) you will clearly be able to see the chasms in the earth leading towards the main mouth of the falls. This is a great time to enjoy some of the fun adrenaline activities available around the falls.