Northern Circuit Route in May
May is the transition month — late May marks the real shift toward dry season.
What to Expect in May
Early May continues the long rains pattern from April. By mid-May the transition begins to become noticeable, particularly on the northern slopes. By the final week of May — particularly from May 25 onward — the shift can be abrupt and dramatic. Climbers finishing on the Rongai or Northern Circuit routes from May 28 report conditions that can rival February in terms of clarity. The mountain is still technically in its wet window, but the dry season's arrival is predictable and imminent. For safari: the Great Migration herds begin their long movement north from the Ndutu plains in May. This is the start of one of the world's great wildlife spectacles — the journey toward the Mara River crossings of July and August.
Northern Circuit Route — specific note
The Northern Circuit is 9–10 days — too long to manage well in the rainy season. If you need to climb in April or May, consider Rongai (shorter, drier approach) instead.
Our verdict
First half of May: still wet, avoid if possible. From May 20+: viable for experienced climbers. The transition is real — the dry season typically arrives by month's end. Excellent combined climb + safari window.
Northern Circuit Route
Full circumnavigation. Maximum acclimatization. Least crowded. Highest success rate on Kilimanjaro.
Further Reading
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