Het weer in Kigali in mei

Forum posters describe December temperatures in Kigali as typically around 25C, consistent with Rwanda's fairly steady year-round warmth, with the country's two rainy seasons running mid-January through April and mid-October through mid-December - meaning December sits right at the tail end of that second, shorter rainy stretch. Posters visiting around Christmas for gorilla trekking specifically note conditions can bring genuinely ankle-deep mud on the trails, making the hike noticeably more strenuous even though rain itself doesn't rule out a visit. Posters generally recommend the December-through-February window as favorable overall, contrasting it with March and May, which posters flag as considerably wetter months. Posters generally rate December as workable, with real but manageable rain given its position at the end of the shorter rainy season.

June opens Rwanda's long dry season, which runs through September, and Kigali reflects it plainly: near 24°C by day, 15 overnight, and rain on under two days across the whole month. That is the reason June to September is peak gorilla-trekking season — the trails are less muddy and the weather far more predictable. Two things the forum insists on. Permits sell out in this window, so book early. And the Virunga volcanoes are much higher and cooler than the capital: light rain showers happen up there even in the dry season, so mountain clothing is not the same as Kigali clothing.