Regional variations
The coast has the hottest, most humid climate, and receives the Indian Ocean monsoon during the main rainy season. Average temperatures range from 24°C (July) to 28°C (February to April). The north and east have a semi-desert and desert climate, due to winds and continental influences. In the west, around Lake Victoria, a tropical dry-winter savannah (or Aw) climate prevails. Rainfall is fairly abundant, but the dry seasons are very marked. The highlands, including Nairobi, have a more temperate climate due to their altitude and mix of influences. It remains hot, but can be dry or humid depending on the season. In July, temperatures in Nairobi range from 11 to 21°C, and in February from 14 to 26°C.
Four seasons
Mid-December to mid-March. This is the height of the tourist season. The weather is generally warm and dry, but you won't be alone on the dusty trails! If you don't mind the crowds, this is an interesting time of year. The animals are easy to observe as they gather around the few remaining waterholes, and you're almost certain to be traveling under the sun. Remember to book in advance.
Late March to early June. This is normally the time of the big rains. The showers quickly turn the tracks into a veritable quagmire, making some circuits impassable. Unfortunately, in recent years, there has been a tendency to run out of water. On the coast, hot weather combines with sunshine and showers. Tropical humidity guaranteed!
June to October. This is the "shoulder" season, with fairly dry weather and the great wildebeest and zebra migration to the Maasai Mara. September and October are still the best months to visit Kenya: the weather is still fine and warm, the animals are easy to observe and there are far fewer tourists.
Mid-October to mid-December. This is the short rainy season. The advantages are the same as in April, May and June (tranquility, beautiful light and scenery, low prices). Unfortunately, it still rains a lot, but much less than during the main rainy season. The tracks are a little less broken, so the choice of circuits is a little wider.
Repeated droughts
Since 2006, the Horn of Africa, which includes all of northeastern Kenya, has been experiencing severe drought, with increasingly scarce rainfall. Repeated periods of drought are causing severe food shortages. Not only populations, but also flora and fauna are affected. As part of its efforts to combat and adapt to climate change, Kenya is planning to commit $8 billion to a project aimed at restoring at least 500,000 hectares of grazing land in 11 arid counties.