Arusha is the northern circuit’s arrivals and departures, and services both the Serengeti and Kilimanjaro. At 1400m it is both relatively cool and wet. Temperatures average out at 19°C and the town and surrounding area receives in the region of 1052mm of rain a year. March - May and November and December are the rainy seasons, April by far the wettest month, and January - February is mildly wet in good years. Late May through to October is very dry. Given the relatively low levels of precipitation during November and December, October through to February is the best time to visit nearby Arusha National Park and to climb Mount Meru.