The classification and mapping of vegetation is a time consuming process and it takes scientist and experts for accurate data to be relied upon.The use of Koppen climate classification system is the most widely used for classifying world climate in both a simple and complicated manor. Classification system use today was developed from the one introduced by the Russian-German climatologist Koppen in 1900. He divided Earth’s climatic regions to generally coincide with world pattern of vegetation. He recognizes five major climate types and denotes them with capital letters. He further subgroup them by designating a second, lower case letter which distinguish specific seasonal characteristics of temperature and precipitation.According to his classification the five climate types are: Moist Tropical climate (A), Dry climates (B), Humid Middle Latitude climates (C), Continental climates (D), and Cold climates (E). Based on the method he uses for climate classification city of Johannesburg falls in Group 2 of the climate classification. The city is therefore having a Low-Latitude climate and further be classified to be having a Tropical Moist climate. The classification is characterized by a temperature range of 180C (0F). The average maximum average temperature of Johannesburg during the period 1961-1990 is about 21. The annual precipitation in this kind of climate range is expected to be at 262 cm(103 in) and a latitude range of 100S to 250N just like Johannesburg.The rainfall in Johannesburg is heavy in all months as shown by the data in the table and temperature and humidity mostly have stayed the same within the months. The climate in this region is mostly controlled by the tropical air mass. Johannesburg soil is considered to be Oxisols since it is the most abundant soil in the humid and per humid tropics covering about 35% of the land. The land is also covered with 28% of Ultisols since it is the type of soil that mostly covers the coastal region of the land and has low area to occupy. The soil is not good agriculture wise and therefore most Johannesburg farmers have highly depended on weather focused to enable their production better, the heavy rainfall has shown by the historical data has been the hope of South Africans in Johannesburg for a long period of time.Climate change and agriculture are always an interrelated process, both of which take place on a global scale.