Because Tanzania lies below the equator, the coolest months occur during the northern hemisphere's summer, and all-year round the weather remains pleasant and comfortable.
Between June to October, temperatures range from around 10℃ in the northern highlands to about 23℃ on the coast. On the plains and the lower-altitude game reserves, the temperatures from June to October are warm and mild. On the coast, these months are some of the most pleasant to visit, with balmy, sunny weather much of the day and cooling ocean breezes at night.
Tanzania's equatorial climate brings two seasons of rain each year: the masika, or long rains that fall from mid-March to the end of May, and the mvuli, or short rains, that come intermittently throughout November and parts of December, and sometimes stretch into early January.
During the long rains, heavy showers fall in the early mornings but usually clear up by mid-day, with the weather often remaining clear and sunny until late afternoon.
During the short rains, light showers in the mornings and late afternoons are punctuated by stretches of clear weather and beautiful rays of sunlight.
From December to March, the days are hot and sunny with often not a cloud in the sky. Temperatures range from the mid-twenties to the low thirties throughout the country while visitors flock to the parks and beaches to escape the dreariness of late winter in colder climes.
For more information please visit the following sites: Tanzania Tourist Board