The climate is tropical, with mean annual rainfall ranging from 1,100-1,700 mm. Rainfall is higher in the north than the south of KNP. Seasonal peaks are observed from March to May and from
September to November. Annual mean temperature ranges from 14-150 C minimum to 26-270 C maximum, with small daily variations.
The park occupies undulating terrain on the main Ugandan plateau draining in a southerly direction.
The Mpanga and Dura rivers flow southwards through the park into Lake George.
Mean annual rainfall in the region is 1750 mm (1990-1999, or 1543 mm from 1903-2000, see evidence of climate change below); the mean daily minimum temperature is 15.5 Co; and the mean daily maximum temperature is 23.7 Co (1990-1999, Chapman and Chapman, unpublished data). Rainfall is bimodal, with two rainy seasons generally occurring from March to May and September to November. Over the last century there has been an increase in the amount of rainfall that the region receives annually.
Northern Kibale is the park’s wettest area, receiving a mean annual rainfall of up to 1700mm, mostly during March-May and September-November. The climate is generally pleasant with a mean annual temperature range of 14-27oC. Temperatures are highest (and rainfall lower) in the south where the terrain drops down onto the hot rift valley floor and forest gives way to open grassland.
Dry Season: June to September is the driest time and temperatures average 80°F (25°C) when most animals remain near water, but be prepared for afternoon thunderstorms at any time. The hot dry time is January to February and is a good time to visit.
Rainy Season: It rains anytime from October to December and March to May when many roads become become challenging to use. A good 4×4 vehicle is essential.