Аннотация:Temporal and spatial statistics of air temperature and precipitation within mountaineous river basin of arbitrary sizes is one of the most important stages of the computation and has a significant influence on the accuracy of final result. Previously this problem solved by developing local relationships between air temperature, precipitation and ablation. In the majority of cases the local relationships are neither reliable nor representative or are not available at all. The paper presents another method for spatial and temporal extrapolation of monthly precipitation and mean monthly air temperature for the whole mountainous area of Central Asia. Its main idea is numerical description of the fields of meteorological characteristucss in the coordinates: latitude, longitude, altitude and time.