Based on variations in temperature, Eritrea can be broadly divided into three major climate zones: the temperate zone, subtropical climate zone, and tropical climate zone. The climate of Eritrea is shaped by its diverse topographical features and its location within the tropics. The diversity in landscape and topography in the highlands and lowlands of Eritrea result in the diversity of climate across the country. The highlands have temperate climate throughout the year. The climate of most lowland zones is arid and semiarid. The distribution of rainfall and vegetation types varies markedly throughout the country. Eritrean climate varies on the basis of seasonal and altitudinal differences.