Tanzania has a generally comfortable climate year-round, although there are significant regional variations. The tropical coast stays quite hot and humid with heavy and reliable rainfall, especially during the rainy season. The central plateau is cooler and arid. There are two rainy seasons—the heaviest rains (called masika) usually fall from mid-March to May, and a shorter period of rain (called vuli) occurs from November to mid-January. The dry season, with cooler temperatures, lasts from...