Due to Mount Kilimajaro's proximity to the equator, this region does not experience the extremes of winter and summer weather, but rather dry and wet seasons. Therefore, the best time to climb Kilimanjaro tends to be the warmest and driest months (see Kilimanjaro weather). The primary issue is safety, as the risks associated with climbing increase significantly when the weather is foul. The effects of rain, mud, snow, ice and cold can be very strenuous on the body. Correspondingly, your chances of a successful summit also increases significantly with nice weather. Of course, the mountain gets more traffic during these periods as well.
The table below lists the relative temperature, precipitation, cloudiness and mountain traffic (crowds) during the calendar months.
It is possible to climb Kilimanjaro year round. January, February, and September are considered to be the best months in terms of weather, and correspondingly are the busiest months. 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. From the end of March to early June is the long rainy season. Visibility may be low due to heavy clouds, but the crowds are gone. June, July, and August are good months, but it is colder. Following September and October, the short rainy season lasts from November through the beginning of December, where afternoon rains are common, but skies are clear in mornings and evenings.