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Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax208518952096202920822026
Tmin209018992106203520852032
Duration of sunshine93869390124150
Precipitation186169187181186180
Humidity/Visibility183166183176179174


ParameterJulAugSepOctNovDec
Tmax209520932056212720632128
Tmin210221022059213220682130
Duration of sunshine1861241201249093
Precipitation187190210215210217
Humidity/Visibility175179199206206215


Climate data is usually derived from meteorological data of a certain number of years. The actual number of recorded years may vary from only a couple to 50 years or more. The quality of climate data depends on the number of available recorded years. Fewer years means less reliable data. The standart-period for reliable climate data is 30 years. For example, the mean monthly temperature for, let's say January, would ideally calculated from a total number of 930 recorded January-days. However, the usual number of recorded days is much smaller. The table above shows the actual number of recorded days for every parameter measured.