World

Europe

Perugia (205m)





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax10710294818885
Tmin1019280808277
Duration of sunshine797059515949
Precipitation125117129121125120
Humidity/Visibility888298919484


ParameterJulAugSepOctNovDec
Tmax8710610510110078
Tmin819994919075
Duration of sunshine436464594337
Precipitation128159152150149131
Humidity/Visibility87989910610089


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.