The weather on Mount Kilimanjaro varies widely from the cultivated zone at the base, the rainforest at the foot slopes of the mountain, to the arctic zone at the summit. The temperatures can range from 25⁰C at the base of Mount Kilimanjaro to subzero by the time you reach the summit. As you traverse different vegetation zones on your route, expect some rainfall too in the process of trekking. Due to the high altitudes of Mount Kilimanjaro, the mountain creates its own weather.
More about the weather around Mount Kilimanjaro