Precipitation amounts, corrected for measuring er rors, are presented on maps for different parts of the climatologically determined vegetation period. The variability and probability of summer precipitation amounts are analysed for stations having long records. The frequency of runs of different length for wet and dry summers is compared with random. Lowpass filter is used to smoth the time series.
The difference between precipitation and evapotranspiration - here called humidity - is calculated and presented on maps for certain periods of the vegetation period.