Reading the mountain: weather windows on Kilimanjaro

The mountain makes its own weather Kilimanjaro is a 5,895-metre obstacle standing alone on an equatorial plain, and it forces the trade winds to do all the meteorological work on its flanks. That is why the forecast for Moshi tells you almost nothing about the mountain: our rain gauge at Barranco disagrees with the one at Marangu Gate on the same afternoon.

What matters is the large-scale pattern. In our hemisphere's winter the dry southeast trades ride over the summit — those are the blue-sky June–October weeks. In the new year the northeast monsoon arrives with its heavier clouds and colder summit nights, and the walking is still good but you earn it more.

The three-day rule Watch the Indian Ocean, not the mountain. When a tropical low sits off Zanzibar, the moisture arrives over the massif about seventy-two hours later. Our office tracks this pattern all season; it is the quiet reason our groups tend to be on the summit when other groups are in their tents at Barafu listening to weather.

• Summit-night winds below 40 km/h: comfortable
• 40–60: slower pace, more layers, same plan
• 60+: the lead guide calls it — and the mountain will still be there

What we tell guests in the briefing You cannot pick your summit weather from home, but you can pick your season, and you can pick an itinerary with rest days that allow the plan to shift a day. That flexibility is built into every route we run — it is the cheapest weather insurance there is.