Dissertation presents the main climate impacts on geographical distribution and the appearance of organisms around the world. The climate is the average state of the atmospheric atmosphere over a certain place over a given period, considering the average and extreme deviations. Climate is determined based on the following climatic elements: radiation, air temperature, air pressure, direction and wind velocity, air humidity, clouds, rainfall and snow cover. All of this has an enormous impact on geographical distribution and appearance of organisms. The impact of climate on the organism is described by three climatic rules. The Allen rule is the rule that body surges of warm-blooded organisms are relatively smaller in the species that inhabit the colder climate than in the same onest hat inhabit the warmer climates. Gloger's rule expresses parallelism between different climatic conditions (geographic latitudes) and changes in animal pigmentation; e.g. starting from the equator to the poles of the same animals are gradually becoming brighter. Bergmann's rule is the rule that homoiotherms of colder areas are greater than the homoiotherm of warmer areas because by increasing the weight of an animal, the body surface is reduced relative to the weight unit.