Planning for the weather is an important factor for making your trip to Katavi National Park a success, especially when you're splurging. 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.