There are two main trekking seasons on Mount Kilimanjaro – January-March and June-October. The former season is generally colder than the latter but is also often quieter.
June-October is the busiest season on the mountain as it coincides with summer holiday period in Europe and North America.
April, May and November are the wettest months and not ideal for trekking.
December is fast becoming a popular season, despite being very cold on the summit.
Snow cover on the mountain is highest during November-May (the chart below shows average cm of snow on Kilimanjaro’s summit).