Semi-arid climate

  • Hot semi-arid climate ( BSh )
  • Cold semi-arid climate ( BSk )

In a semi-arid climate (from the Latin aridus = dry, arid ) in a region exceeds the evaporation of precipitation per year in six to nine months.


In contrast to the arid climate in which the evaporation most of the year is greater than the existing rainfall, this dangerous for animals and plants mismatch changes seasonally from a more humid climate where the humidity is higher. They form semi-deserts. Many creatures have adapted to the seasonal change and can long survive dry periods. The climate diagrams using the effective climate classification of Köppen Wladimir Peter and Rudolf Geiger illustrate each climatic region in a clear manner.


The example of the city, in the south-central Mali, Mopti the zone of semi-arid climate can be represented in a climate graph. The most important feature is the relationship between temperature and precipitation. According to Köppen and Geiger climate of the city of Mopti is classified as type BSh. The rainfall in Mopti lies in three months, from July to September, over the evaporation. In nine months, the potential evaporation exceeds precipitation so.

BSh climate according to Köppen and Geiger

  • B = Trockenklimate
  • S = Semi-Arid
  • H = hot

A BSh climate can be found in Central Africa, Southeast Africa, Pakistan, in deforested part of Central India and in northern Australia. This often funded by desertification climate does not allow for agriculture because of the short growing season.