Climate
      Although Nairobi is situated in the middle of East Africa, its high altitude—about a mile above sea level—means that the city's climate is mild year-round. Visitors are spared the extreme, blistering temperature found in other regions of Africa, or even Kenya. Summer months in Nairobi are December through March, when average highs are in the upper 70s and lows are in the mid- to upper-50s. Winter months (June through September) are a little cooler. Average highs are in the lower 70s, and lows are in the lower 50s.

    Rainfall does vary according to season. The wettest months are in the Autumn, from March through June. April sees upwards of 8 inches of rain on average. Cloudy, rainy days are common in the Autumn. October through December is the region's second rainy season, where "short rains" bring about 5 inches of rain to the area in November. Otherwise rainfall is pretty scarce, about two inches a month.

    February sees the most sunshine in Nairobi, with about ten hours of daylight. Half a year later, in August, sunshine lasts for about five or six hours.

Here is the link to: Nairobi Kenya Weather - Five Day Forecast