Wladimir Köppen first published his climate classification in 1884. His early work presented a map of climatic zones based chiefly on seasonal temperature ranges, laying the foundation for the classification system that later became known as the Köppen climate classification.
The 1884 publication was not the final form used in modern atlases. Köppen continued refining the scheme as meteorological observations improved and as he related climate boundaries to vegetation patterns. A more developed version appeared around 1900, followed by major revisions in 1918 and 1936.
Köppen’s approach became influential because it used measurable temperature and precipitation thresholds while also reflecting the distribution of natural vegetation. It grouped climates into five broad categories: tropical, dry, temperate, continental and polar.
Later, Rudolf Geiger modified and extended the system, producing the widely used Köppen–Geiger version. This later collaboration explains why modern references may emphasize 1936 or later dates, even though Köppen’s first published classification dates to 1884.