The first question Nelson gets about rainy-season climbs is almost always: "Should I just rebook to a different month?" The honest answer is: usually yes, but not always. There are real reasons to climb in the rainy season, and there are routes that handle it well.
This post covers what the rainy season actually looks like on Kilimanjaro, which routes still work, and the trade-offs of climbing in the wet months.
Tanzania's two wet seasons
Tanzania has two rainy seasons:
- The long rains: April and May. Heavy rain in the lower forest, frequent rain in the moorland, snow at altitude. The toughest months on the mountain.
- The short rains: November. Lighter, more localised rain. Often clear mornings with afternoon showers. Manageable.
Outside these months, conditions are generally dry. The dry seasons are January-March and June-October. December typically returns to dry after the short rains pass.
What "rainy" actually means on Kilimanjaro
Rain in Tanzania is regional. On Kilimanjaro the southern and western slopes catch most of the rainfall because the prevailing winds drop their moisture against the windward side. The northern side of the mountain sits in a rain shadow and gets a fraction of the rain.
This is why Rongai (the only northern approach) is the natural rainy-season route. The same long rains that turn Lemosho or Machame into muddy slog produce only intermittent showers on Rongai.
On a wet-season climb of the southern or western routes, expect:
- Heavy rain in the rainforest zone (1,800-2,800 m). You will get wet despite your hardshell.
- Frequent rain in the moorland zone (2,800-4,000 m). Cooler, more sustained drizzle.
- Snow rather than rain above 4,000 m. The summit sees more snowfall in the wet season.
- Cloud cover obscuring views from camps. Sunrises from camps are less reliable.
- Muddy trails on the lower sections. Slippery footing in places.
The routes that work in the wet season
Rongai (the best wet-season option)
Kilimanjaro's only northern approach. Climbs from the dry forest near the Kenya border up the leeward side of the mountain. Sits in a rain shadow that gets a fraction of the rainfall of Machame or Lemosho. The natural choice during April-May. Even in the long rains, Rongai often has dry mornings with only afternoon showers.
Marangu (the practical wet-season option)
The only route with permanent hut accommodation. Climbers don't pitch tents in the rain. The huts at Mandara, Horombo, and Kibo provide weatherproof shelter. The trail itself still sees rain in the lower zones, but the rest and sleep are protected. We strongly recommend the 7-day Marangu in the wet season, with the extra night at Horombo for proper acclimatization.
Routes to avoid in the long rains
Lemosho, Machame, Umbwe, and Northern Circuit all run through the wet southern and western slopes. The lower forest zones become genuinely difficult in April-May. Camping is wet, breakfast is wet, sleeping bags get damp despite tent precautions. Possible, not enjoyable. We discourage western and southern routes in April-May.
The case for climbing in the wet season
Despite the trade-offs, there are reasons climbers choose wet-season climbs:
- Lower prices and availability. Many operators discount wet-season climbs. We don't aggressively discount, but availability is higher.
- Quieter trails. Camps and trails are markedly less crowded.
- Beautiful vegetation. The rainforest at its lushest and greenest. The giant groundsels in Barranco Valley at their healthiest (if you climb a southern route).
- Schedule constraints. Some climbers can only get time off in April-May.
- The challenge. Some climbers want the experience of climbing in less-than-perfect conditions.
What you trade away
- Summit visibility. Cloud cover at sunrise is more common in wet season. You may not get the clear sunrise from Uhuru.
- Trail comfort. Mud, wet camps, wet gear, damp sleeping bags.
- Photography opportunities. Less dramatic light, more cloud.
- Some routes entirely. Western and southern routes become genuinely difficult.
How we run wet-season climbs differently
On a wet-season Rongai or Marangu, we adjust some operating decisions:
- Extra rain gear in the team kit. Spare ponchos and shell layers.
- More fuel for hot tea and meals. Hot drinks matter more in wet conditions.
- Earlier camp arrivals when possible. So gear can dry before night.
- Different pace decisions on muddy descent sections.
- More emphasis on the pre-trek briefing. Wet-season climbers need to understand specifically how to manage moisture, cold, and morale.
The bottom line
The long rains (April-May) are the toughest months on Kilimanjaro. Rongai is the natural choice; Marangu with huts is the practical alternative. The short rains (November) are lighter and more manageable but still favour Rongai and Marangu over the western routes.
If you have flexibility, climb in the dry seasons. If you must climb in the wet season, choose Rongai or Marangu, accept the trade-offs, and bring better rain gear than you think you need.
For the full month-by-month picture, read When Is the Best Month to Climb Kilimanjaro.
Frequently asked questions
Are climbs ever cancelled because of weather?
Almost never. Kilimanjaro can be climbed in any weather we accept bookings for. Specific high-risk weather events on summit day might delay a summit attempt by 24 hours, but a complete cancellation is rare.
Should I bring extra dry bags in the wet season?
Yes. Pack everything inside the duffel in waterproof dry bags or heavy plastic. Pack a spare set of dry base layers and socks in a sealed bag. Keep a separate dry set of clothes for sleeping. The single biggest morale hit of a wet-season climb is wet clothes in cold camp.
Will the trails be slippery?
Yes on the lower forest sections. The rainforest paths can become genuinely muddy. Sturdy boots with good traction and trekking poles for balance are even more important than usual. The upper trails (alpine desert, summit zone) are mostly rock and not significantly affected.
Related posts
When Is the Best Month to Climb Kilimanjaro?
January-March and June-October are the two dry windows. Each has its own personality. Here is the honest month-by-month breakdown.
How Cold Does Kilimanjaro Actually Get?
Tropical heat at the gate, -20 C at the summit. Five distinct climate zones, each with its own dress code. Here is what to expect by altitude.
Lemosho vs Machame: Which Kilimanjaro Route Is Right for You?
Both routes meet at Lava Tower and follow the same Southern Circuit. The difference is what happens in the first three days. Here is the honest comparison.