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Month-by-month temperatures, rainfall data, and climate zone breakdowns from guides with 800+ summits and 15 years on the mountain.
Kilimanjaro can be climbed year-round, but the best weather windows are January-March (dry, cold) and June-October (dry, warm). Temperatures range from 25°C at the gate to -20°C at the summit. You will pass through 5 climate zones — from tropical rainforest to arctic summit — experiencing a 50°C temperature swing in just 5 days of trekking.
Kilimanjaro sits just 3 degrees south of the equator in northern Tanzania, yet its summit is permanently below freezing. This extraordinary range — from equatorial heat to arctic cold — is what makes Kilimanjaro's weather unique among the world's great mountains. Unlike the Himalayas or Andes, where weather systems can shut down an entire mountain for weeks, Kilimanjaro's equatorial position means it does not experience the prolonged storms or jet-stream disruptions that plague higher-latitude peaks.
Instead, Kilimanjaro's weather is governed by two primary factors: altitude and seasonality. As you climb, the temperature drops by approximately 6.5°C for every 1,000 metres of elevation gained. This means you lose roughly 33°C between the gate (1,800m) and the summit (5,895m). Seasonality determines rainfall: Tanzania has two rainy seasons — the long rains (masika) from March to May, and the short rains (vuli) in November.
In our 800+ expeditions over 15 years, we have observed that altitude — not the calendar — is the primary weather variable. A climber on any given day will experience tropical warmth, temperate mist, alpine chill, and arctic cold within a single trek. The month you choose determines how much rain you encounter in the lower zones, but the cold at the summit is a constant year-round reality.
Key insight: Kilimanjaro creates its own weather. The mountain forces warm, moist air upward, causing it to cool and release moisture as rain in the forest zone. By the time air reaches the alpine desert above 4,000m, it is dry. This is why the upper mountain is almost always clear, even when clouds smother the lower slopes.
Temperature, rainfall, and crowd data for every month of the year, based on 15 years of observations from our guide team.
| Month | Gate Temp | Summit Temp | Rainfall | Rating |
|---|---|---|---|---|
| January | 20-25°C | -5 to -15°C | Low | Best |
| February | 20-25°C | -5 to -15°C | Low | Best |
| March | 18-23°C | -5 to -15°C | Increasing | Good |
| April | 16-20°C | -5 to -10°C | Heavy | Avoid |
| May | 16-20°C | -5 to -10°C | Heavy | Avoid |
| June | 18-22°C | -7 to -15°C | Low | Best |
| July | 18-22°C | -7 to -20°C | Very Low | Best |
| August | 18-22°C | -7 to -20°C | Very Low | Best |
| September | 20-24°C | -5 to -15°C | Low | Best |
| October | 20-25°C | -5 to -15°C | Increasing | Good |
| November | 18-23°C | -5 to -10°C | Moderate | Fair |
| December | 18-23°C | -5 to -15°C | Moderate | Good |
Kilimanjaro is often called “a trek from the equator to the Arctic.” Each climate zone has its own distinct weather, temperature range, and ecosystem. Understanding what lies ahead helps you pack and prepare for every condition.
20-30°C
The lowest slopes of Kilimanjaro are home to banana plantations, coffee farms, and small Chagga villages. The air is warm and humid, with temperatures averaging 25°C. Most climbers pass through this zone quickly on the drive to the trailhead, though the Marangu and Rongai routes begin within it. Expect lush green scenery, red earth roads, and the sounds of everyday Tanzanian life.
15-20°C
Dense, humid montane forest that receives the most rainfall on the mountain — up to 2,000mm annually. Temperatures are mild but the canopy traps moisture, making it feel damp. This is where most rain gear gets its first test. You will hear colobus monkeys crashing through the branches and see moss-draped trees towering overhead. The trail is often muddy and rooted. In our 800+ expeditions, the rainforest day is where we remind climbers: this mountain has five worlds.
5-15°C
Above the tree line, the landscape opens into rolling moorland dotted with giant heather, lobelia, and groundsel — plants found nowhere else on Earth. Morning mist rolls through, and temperatures swing dramatically: warm in the sun, cold in the shade. Clouds often form below you by midday, creating the surreal experience of walking above a white sea. This is the critical acclimatization zone where altitude symptoms typically begin.
0-10°C day / -10°C night
A stark, barren moonscape with almost no vegetation. Daytime temperatures can reach 10°C in direct sun but plummet below freezing after dark. The air is thin and dry — your lips will crack, your throat will feel parched, and every step requires more effort. Rainfall is rare here; less than 200mm per year. The UV radiation is intense at this altitude, making high-SPF sunscreen and quality sunglasses essential even on overcast days.
-15 to -25°C
The roof of Africa. Glaciers, ice fields, and scree dominate this zone. Temperatures regularly drop to -20°C and below, with wind chill pushing the perceived temperature to -30°C or colder. Oxygen levels are roughly 50% of what you breathe at sea level. The famous glaciers of Kilimanjaro — Furtwangler, Rebmann, and the Southern Icefield — occupy this zone, though they are retreating rapidly. Summit night takes you through this zone in 6-8 hours of darkness.
The coldest hours of your climb
Summit night is the defining weather experience on Kilimanjaro. You depart camp between 11 PM and midnight, stepping into darkness and biting cold. The temperature at Barafu Camp (4,673m) or Kibo Hut (4,720m) at departure is typically -10 to -15°C. As you ascend through the night, temperatures drop further, reaching -15 to -25°C at the crater rim (5,685m) and Uhuru Peak (5,895m).
Wind is the hidden variable. Even a moderate 20 km/h breeze at -20°C creates a wind chill of approximately -30°C. On the exposed sections of the crater rim, between Stella Point and Uhuru Peak, there is no shelter from the wind. In our experience, this 45-minute traverse is the coldest part of any Kilimanjaro expedition.
Base Layer
Thermal top and bottoms (merino wool preferred). Moisture management is critical — sweat that freezes will make you colder.
Insulation Layer
Heavy fleece plus down jacket (rated to -20°C minimum). This is your primary warmth source. Do not start with the down jacket on — you will overheat on the steep sections and then freeze when you stop.
Shell Layer
Windproof and waterproof outer jacket. Wind protection is more important than insulation at the summit. A Gore-Tex shell blocks the wind that strips heat from your body.
Extremities
Balaclava, thick gloves with waterproof mitts over the top, two pairs of thermal socks, and chemical hand warmers in your gloves. Your fingers and toes lose heat fastest.
From our guides: The most common mistake on summit night is starting with too many layers. You will generate significant body heat on the steep switchbacks to Stella Point. Start with your base layer and fleece, keeping the down jacket in the top of your pack. Add the down jacket when you stop for a break or when you reach the crater rim. Starting too warm leads to sweating, which leads to dangerous chilling when you stop.
Your clothing system must handle a 50°C temperature range — from 25°C at the gate to -25°C at the summit. Layering is the only strategy that works.
Kilimanjaro has two primary dry seasons that offer the best climbing conditions. The choice between them comes down to your priorities: weather, crowds, and budget.
Cold and dry. February is statistically the driest month on Kilimanjaro with the clearest skies and best visibility. Summit temperatures are cold but manageable (-5 to -15°C). Crowds are moderate — fewer climbers than the July-August peak but enough to feel the trail is alive. This is an excellent window for photography, with clean air and dramatic ice formations on the glaciers. The rains begin arriving in late March, so early March is better than late March.
The classic Kilimanjaro climbing season. June marks the start of the long dry season, with very low rainfall through September. July and August are the busiest months on the mountain and also the coldest at the summit (-7 to -20°C). September and early October offer a sweet spot: dry conditions, slightly warmer summit temperatures, and thinning crowds. This is the window most of our guided groups target.
November offers fewer crowds and lower prices. The short rains bring some afternoon showers in the lower zones, but above 4,000m the weather is often fine. If you choose the Rongai Route from the drier north side, November can be an excellent value option.
July and August group departures fill months in advance. If you plan to climb during peak season, book at least 3-4 months ahead to secure your preferred dates and route. Our Lemosho 8-day departures fill fastest.
For a deeper analysis of every month with pricing data, crowd levels, and route recommendations, see our complete best time to climb Kilimanjaro guide.
Not all routes experience Kilimanjaro's weather equally. The direction of approach and altitude profile determine how much rain, wind, and cold you encounter.
The western approach catches more moisture from prevailing weather systems, making the rainforest section wetter than most routes. Days 1-2 see the heaviest rainfall. However, the Barranco Wall and subsequent traverse offer dramatic views when skies clear. From our base in Moshi, we advise Machame climbers during the dry season to expect at least one full rain day in the forest, even in July-August.
View Machame Route itinerary →The driest approach to Kilimanjaro. Starting from the Kenyan border on the north side, Rongai sits in the rain shadow of the mountain and receives significantly less precipitation. This makes it the best choice during the shoulder seasons (March, November) when other routes are wetter. The trade-off: less dramatic scenery in the lower zones and a more gradual, less varied landscape.
View Rongai Route itinerary →Starts with two days through pristine rainforest on the western Shira Plateau approach. The western start means more rain in the forest, but the 8-day itinerary provides excellent acclimatization that more than compensates. By day 3-4, you are above the cloud line in the heath and moorland, where conditions are typically dry and clear. Our most recommended route overall — the extra days give your body time to adjust and increase your summit success rate to 93%.
View Lemosho Route itinerary →When Hans Meyer made the first recorded ascent of Kilimanjaro in 1889, the summit was covered by an estimated 12 square kilometres of ice. Today, less than 1.5 square kilometres remain. The glaciers — Furtwangler, Rebmann, Decken, and the Southern Icefield — have lost over 85% of their mass, and scientists project they will disappear entirely between 2040 and 2050.
For climbers, this means two things. First, the iconic ice walls and glacier formations that appear in classic Kilimanjaro photographs are shrinking every year. Climbing Kilimanjaro now, while glaciers still frame the summit, offers a view that future generations will never see. Second, the retreat of glaciers is changing local weather patterns. Less ice means less moisture recycling at the summit, contributing to drier conditions in the alpine desert zone.
From our base in Moshi, where the mountain dominates the skyline, the change is visible decade over decade. The snow cap that once persisted year-round now comes and goes with the seasons. Our guides who have climbed for 15+ years describe summit ice formations that no longer exist. If seeing Kilimanjaro's glaciers is part of your motivation for climbing, the best time is now.
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