Late March through late May is the rainy season and visitors need to be prepared with suitable wet-weather gear. Directly after the long rains, it’s a wonderful time to visit Tanzania’s national parks due to the abundance of wildflowers and vegetation. It is also a great time to go on safari because there is less dust and tourist numbers are minimal.
July through October is Tanzania’s dry season and the high/peak season for tourists. It’s the best time to view wildlife as grasses are virtually nonexistent; however it is usually dusty and can be quite cold at higher elevations such as Ngorongoro Crater.
Tanzania’s short rains occur from late October through mid December, a time when there are usually fewer tourists in the national parks. December through March is Tanzania’s “summer” and many people visit at this time for optimal wildebeest migration viewing. Please note that the migration’s movement follows the rainfall so its exact location is difficult to predict.