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Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax117110124116122115
Tmin114109123118119117
Duration of sunshine000000
Precipitation131113124123129121
Humidity/Visibility117109122116119117


ParameterJulAugSepOctNovDec
Tmax122120116117114124
Tmin112117116118110119
Duration of sunshine000000
Precipitation128125121122125133
Humidity/Visibility121119117117113120


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.