It is possible to climb Kilimanjaro year round, however it is best to climb when there is a lower possibility of precipitation. The dry seasons are from the beginning of December through the beginning of March, and then from mid-June through the end of October. These are considered to be the best times to climb, in terms of weather, and correspondingly are the busiest months (high season). Most of our group climbs are scheduled to correspond with the dry season.
From January through mid-March are the warmest months, with clear skies in the mornings and evenings. During the day, clouds may appear along with brief showers. The long rainy season spans from the end of March to early June. We do not recommend climbing during this time unless you are an experienced backpacker who has trekked in similar conditions. It can be very wet, and visibility may be low due to heavy clouds. From mid-June to the end of October, the mountain is generally a bit colder, but also drier. The short rainy season spans from the beginning of November to the beginning of December. Afternoon rains are common, but skies are clear in the mornings and evenings.
Note: Rains are unpredictable and may come early or extend beyond their typical time frames. It is possible to experience mostly dry weather conditions during the rainy season, just as it is possible to have heavy rain during the dry season.