In September, the second rainy season of the year begins in southern Uganda, while the rainy season continues in northern Uganda. It’s not an ideal month to visit national parks or go gorilla trekking, but if you’re willing to put up with heavy thundershowers, challenging roads and difficult hiking to find gorillas, then you’ll be able to save on lodging costs with low season rates, and you may be able to get discounted gorilla trekking permits.