Summary: In the practical work the forecasting of the precipitation to be expected within a given time is often required. In the present paper a method of the statistical estimation is described. On the basis of the precipitation data measured by four stations and by introducing the so-called function of precipitation-saturation the author gives an analysis of the distribution-functions of the days required for attaining the cumulative precipitation amounts. After the statistical checking of the data-series (analysis of independence and of homogeneity) the computation, evaluation of the parameters of the Gamma-distribution was carried out. This was sufficient for making the forecast for a single station (and its close environment). For theareal generalization the distribution Type Pearson-Ill had to be applied. Thus the method became suitable for statistical estimations concerning larger geographical units.

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