The Weather on Kilimanjaro is divided into two seasons. The wet season (rainy) and the dry season (not rainy). The dry season, for obvious reasons, is the best time to climb Kilimanjaro. So why are there only two seasons?
Kilimanjaro is located very near the equator so having four seasons is not possible. Generally, the further away from the equator, the cooler the winter and summer temperatures. At the equator, there are no seasons because each day the Sun strikes at about the same angle. Every day of the year the equator receives about 12 hours of sunlight.
Temperature on Kilimanjaro
To see the average temperatures by month and the rainfall by month on Kilimanjaro follow this link.