Gitega sits at around 1,800 metres above sea level, which gives it a pleasantly temperate climate relative to Bujumbura on the lake. Temperatures are mild year-round, ranging from 15–25°C, and the altitude means nights can be cool even when days are warm.
The dry seasons are June to September and December to February. The short rains typically fall in October to November, and the long rains run from March to May. The dry months are more comfortable for travel and road conditions are better. June to September is generally considered the best time to visit Burundi overall — Gitega is pleasant throughout these months.
Political and security conditions in Burundi affect travel more than weather; check the current situation before planning a visit. The country has a history of political volatility, and the advice of your government's foreign travel service should be consulted alongside any practical planning.