April–May: This period marks the “long” rainy season, starting in late March and lasting until mid-May. April is also the coldest month of the year in Tanzania. Fewer climbers attempt Kilimanjaro during this time, but there is a high likelihood of encountering rain on the trails.

June–July: Rainfall gradually decreases, making the weather relatively dry and clear, although nights remain cold. June is often quiet, sunny, and underrated as a climbing month. It offers excellent conditions and nearly private trekking routes. As July progresses, the number of climbers increases, and trails begin to get busier.

August–September (Peak Season): These months offer the best climbing conditions. Days are clear and slightly warmer than June and July. The forest and moorland zones may still experience clouds or rain, particularly on the Machame and Umbwe routes, but above the rainforest, the sun usually shines.

October: This is another overlooked month for climbing. Good weather often lasts until mid-October, and trails are much quieter, allowing a more private trekking experience. By late October, conditions become more unpredictable, but occasional rain showers can be managed with proper gear.

November: Known as the “short” rainy season, rainfall can extend into mid-December. Temperatures drop and mist often blankets the mountain, making climbing more challenging but also visually stunning. November is ideal for capturing breathtaking photos of Kilimanjaro’s mist-covered slopes and snow-capped peak.

December–January: The Christmas and New Year period is the second busiest season. Trails are crowded, and rain or clouds may appear at lower elevations, though higher zones are generally clearer.

Mid-January–Mid-March: These months are very popular due to balanced weather—moderately warm, mostly dry days with occasional rain. Rain chances increase toward late March as the long rainy season approaches.