County has an altitude range from 1,240 metres to 2,000 metres above sea level. Southern part of the county is hilly and made of granites which raises it 1950m above sea level. Nandi Escarpment is a key feature on the eastern border of the county with steep cliffs rising from 1700m to 2000m. The county is also endowed with a number of hills like Misango, Imanga, Eregi, Butieri, Sikhokhochole, Mawe Tatu, Lirhanda, Kiming’ini hills among others.
Rainfall is uniformly distributed throughout the year with march and July receiving highest whereas December and February the least.
The county has annual rainfall that range from 1280.1 mm to 2214.1 mm per year. The temperature range is 18 °C to 29 °C with the hottest months being are January, February, March and on the others side July and August being the coldest.