The best time to go to Rwanda is during the dry seasons, which run from June to September and December to February.
These months offer the most comfortable conditions for popular activities like gorilla trekking and wildlife safaris. The drier weather means less mud on forest trails, making hikes more manageable, and vegetation is less dense, which can improve visibility for spotting animals in national parks like Akagera.
For those primarily interested in gorilla trekking in Volcanoes National Park, the long dry season from June to September is particularly ideal. The trails are at their driest, and the chances of clear skies for photography are higher. This period is also excellent for exploring the park's volcanic landscapes.
If you're planning a wider itinerary that includes chimpanzee trekking in Nyungwe Forest National Park, the shorter dry season from December to February is also a good option. While there might still be some rain, it's generally lighter and less frequent than during the peak wet seasons, making forest walks more pleasant.