The relatively high elevation in northern Tanzania means that it never gets too hot. Indeed the nights and early mornings can be quite chilly. You are well advised to take along a heavy sweater and a windbreaker or jacket. Expect temperatures to average from 15°C in May to August and 22°C over December to March. The weather is best between June and September, but do not bet on seeing any animals in the Serengeti. For a safari covering all the parks of northern Tanzania, September to March is a good time. But remember that some of the other parks in the region offer nearly year round game viewing opportunities. April and May can be a challenging period for dong a safari for as this is when the weather is at its rainiest.
On safari, bright coloured clothing may get you in trouble with wild animals. If you are wise you will pack brown, beige and khaki clothing. Short sleeve shirts, shorts and trouser for men are adequate. For ladies, short sleeve blouses, slacks and skirts are ideal. Though the northern
region is well outside the predominantly Muslim coast areas and ladies do not have to dress too conservatively, modest attire is still a good idea. Remember to bring along a pair of sunglasses to shield you from the sometimes harsh tropical glare. Binoculars will come in very handy for spotting animals.