Weather will likely play an important role when you plan your trip to Katavi National Park, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually September and October, with an average temperature of 22°C, while the coldest months are July and June, with an average of 19°C. The rainiest months in Katavi National Park are December, March, February and January, with each month seeing an average of 318 mm of rainfall.