Kilimanjaro’s 65% overall success rate is the highest of any peak above 5,500m in this database. It is also the most misleading number on this entire site. The aggregate figure blends an 85% success rate on the Lemosho 8-day route with a 50% rate on the Marangu 5-day route — a 35-point spread produced almost entirely by the number of acclimatization days, not the climbers themselves.

How to read these numbers: Success is defined as reaching Uhuru Peak (5,895m) on Kibo. Because independent climbing is prohibited in Tanzania, all rates reflect guided ascents segmented by route and itinerary length.

Kilimanjaro is climbable year-round, but two distinct dry seasons produce meaningfully better outcomes. The long rains (March–May) and short rains (November) bring low visibility, slippery trails, and increased cold that reduce summit probability.

January and February produce the highest summit rates. October is the hidden gem of the Kilimanjaro calendar: post-rainy season conditions with the smallest crowds of any good-weather month.

Route choice on Kilimanjaro is almost entirely about acclimatization time, not technical difficulty. Every additional day on the mountain adds roughly 6–8 percentage points to summit probability.

The practical implication: if your operator offers Marangu 5-day as a budget option, it is not a bargain. The permit, flights, and preparation cost the same regardless of route. Spending the extra $300–600 for a longer itinerary is the highest-return investment any Kilimanjaro climber can make.

Because the route is non-technical, raw mountaineering experience is less predictive than prior altitude exposure. A fit trekker who has been above 4,500m before outperforms an experienced mountain hiker who has never left sea level.

From TANAPA ranger records and operator-reported exit data, 2015–2025, all routes.

Kilimanjaro has a well-developed rescue infrastructure, with the KCMC in Moshi handling most altitude-related evacuations. The relatively low rescue rate despite enormous climber volume reflects the guided structure that catches AMS before it becomes HACE.

Approximately 10–12 fatalities per year are recorded, most attributed to pre-existing cardiac conditions exacerbated by altitude and exertion. Travel insurance covering high-altitude evacuation is strongly advised.

Kilimanjaro’s overall success rate has improved over the 2005–2025 period, driven primarily by operators increasingly offering longer itineraries and TANAPA’s gradual discouragement of the shortest Marangu packages.

The most measurable change is the declining share of Marangu 5-day itineraries and the growing share of Lemosho and extended Machame packages. This operator-driven shift accounts for most of the improvement in aggregate success rates.