Temperatures vary considerably with height and with time of day. At 3000m. frosts can be encountered at night while day temperatures range from 5 to 15°C. Night time temperatures on the summit are well below freezing. The south-facing side of Mount Kenya receives more sunshine in the December to March period. During this time rock climbs are "in-condition" and snow and ice climbs gradually deteriorate. In the June to October period the north-facing rock climbs and south-facing ice climbs are best.
It's safest to climb Mt. Kenya during the dry seasons: January - February and August to September off the most reliably fine weather. The main routes are likely to be more crowded at this time of the year. If you favor complete solitude over the sunny skies, try going slightly off the peak season. It’s best to avoid the two rainy seasons from mid March until June and from late October to the end of December.
In the lower-altitude forest zone trekkers may come across some rather large and uncompromising African wildlife such as elephants and buffalo - fortunately these are mostly active only at night. Lions, leopard, rock hyrax, various antelope species and a wide range of other creatures large and small occur in the park.