Because of differences in altitude, Kenya climate can be divided into 4 major climatic zones: 

Indian Ocean Coast: The coastal strip has a warm and humid climate throughout the year, but tempered by strong sea breezes, the average maximum temperature of Mombasa vary between 32°C in March and 28°C in July, the average minimum temperature vary between 20°C in August and 24°C in March. The average annual rainfall exceeds 1,000 mm, in this area the most rainy months are April and May, a second less intense rainy season is between October and November. 

Northern Kenya and internal plains: In this area of the country the climate is very dry and arid, with high temperatures, especially in the plains, with averages maximum ranging during the year between 36°C and 33°C and average minimum vary between 22°C and 25°C. Average annual rainfall varies between 500 mm and 200 mm of the extreme northern regions. 

Kenya Highlands: This is the central and western area of the country, much of this area is located between 1200 and 2200 meters in height. The climate of this region is characterized by two rainy seasons with an average rainfall around 1000-1300 mm annually. The rain falls between April and May (the rainy months) and between November and December. The Lake Victoria region is the most rainy area of Kenya in particular the highlands to the north and south of Kisumu, registering an average annual rainfall ranging between 1700 mm and 1900 mm. 

The capital Nairobi, is located in this region, and has a temperate climate moderated by the altitude (1661 m), the summers are sunny and warm while winters are cool. The average maximum temperature in Nairobi vary between 25°C in February and March and 20°C in July, the average minimum temperatures vary between 10°C in July and 14°C in April. The rain falls between April and May (the rainy months) and between November and December, the dry months are those between June and September, the average annual rainfall is 1000 mm. 

Mountains: The areas which have heights above the 2500 meters have a colder climate, with possible frosts and at higher altitude even snow.

The best time to visit Kenya are the months between January and February and between June and September.