Mount Kilimanjaro has four distinct climatic zones:
The rainforest zone (800m-3,000m) is warm and humid. Densely covered with green vegetation this zone temperatures average 12-15 °C (20-25 °C during daytime) at 2,900 m. This is where you are going to spend the first one or two days of your climb, depending on the route.
The low alpine zone (3,000m-4,200m) is a semi-arid area. The higher you climb – the scarcer the vegetation becomes. Depending on the route, here you will spend one or two days with average temperatures range 5-10 °C (15-20 °C during the daytime) at 3,600 m.
The high alpine zone (4,200m-5,000) is desert-like. You will spend your fourth and fifth day on the Mount here, as well as the final arrangements for summiting will be at those altitudes. Here the temperatures average around the freezing point at 5,000m, but during the daytime, when the sun is shining, it is still quite warm and comfortable.
The summit of Mount Kilimanjaro lies in the glacial zone (above 5,000m) and its temperatures average around -6 °C. However, keep in mind that all summiting attempts usually start at midnight in order to reach the Uhuru peak by dawn. You will be trekking at night when the temperature can drop to – 20°C. When the harsh gusts of wind are torturing you, you will be likely to feel as if the temperature is below -40 °C. However, it’s totally worth it, because on the top you will see one of the best pictures you have ever witnessed in the light of the uprising sun.