Tanzania's Weather is interesting in some locations, particularly in the highlands and mountainous places like Mount Kilimanjaro. The temperatures at larger elevations is often quite chilly, Primarily at nighttime, and will even drop under freezing. January, especially afterwards while in the month, is the wildebeest calving season to the Ndutu https://www.zepisaafricansafaris.com/tanzania-in-january-weather-for-safari/