Due to Tanzania's proximity to the equator (between 1 and 11.45 degrees latitude south of the Equator and 29.20 and 40.35 degrees longitudes east), this region does not experience the extremes of winter and summer weather, but has dry and wet seasons instead. The local weather conditions on Kilimanjaro can be somewhat unpredictable to say the very least. Rainfall varies from 2100 mm per year in the rainforest belt to less than 120 mm per year in the summit zone. Similarly, daily temperature changes are unexpected when compared to normal weather cycles, and are largely dependent on altitude.

Mount Kilimanjaro has five major ecological zones, each approximately 3,280 feet (1,000 m) in altitude. Each zone is subject to a corresponding decrease in rainfall, temperature and life as the altitude increases. At the beginning of the climb, at the base of the mountain, the average temperature is around 70°F to 80°F (27°C to 32°C). From there, the temperatures will decrease as you move through Mount Kilimanjaro's ecological zones. At the summit, Uhuru Peak, the night time temperatures can range between 0°F to -15F (-18°C to -26°C). This make Kilimanjaro weather very dynamic and you should always be prepared for wet days and cold nights.