The Dependence of Air Enthalpy in Cracow on Synoptic Situations The work concerns the time changeability — for the decade 1971—1980 — of air enthalpy in Cracow which was analysed within the four seasons. The ,,comfort point" of air enthalpy was established and 21 synoptic situations were considered to show the interactions between air enthalpy and synoptic situa tion fluctuations. To seize the interdependence the Reflection from comfort point", caused by each synoptic situation within the seasons, was calculated. This allowed to classify all synoptic situations according to their biological sensitivity. The evaluation of the ..deflection" size was made by using Brazol scale.