January and February are usually fairly dry where gorillas make their habitat with Rwanda, Uganda and Kenya all experiencing good conditions for trekking at a time of year often thought of as low season.
The months of March, April and May form the rainy season in South East Africa as well as Cameroon and the Republic of Congo and many companies won’t run gorilla watching tours around this time.
June, July and August are the best time to go gorilla watching especially if you’re planning to combine travels in Tanzania thanks to the wildebeest migration taking place over the plains of the Serengeti.
The drier weather means better trekking and traveling conditions however, they’ll also be more wildlife watchers so this can indicate that tracking more elusive gorillas can prove to be all the more problematic.
September and October are the best time to go gorilla watching if you’re also planning to climb Mount Kilimanjaro as conditions are ideal for both activities and definitely worth undertaking before the rainy month of November comes into play.
By the middle of December things have dried up again although there will still be some showers and if you’re looking for alternative Christmas vacation ideas then you could do at lot worse than heading to East Africa to go gorilla watching.