When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Dubai is roughly less than Kruger Mpumalanga. You can assume this to be the case over the next 3 days.
You can imagine temperatures to be in the 41 °C range in July. The weather in Kruger Mpumalanga is generally colder than Dubai's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.