World

Europe

Caen





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax805726806777805777
Tmin804725806777806778
Duration of sunshine184164186177186177
Precipitation188168186181186180
Humidity/Visibility184167185177184178


ParameterJulAugSepOctNovDec
Tmax799803806828806837
Tmin798808809830808837
Duration of sunshine178188209209207217
Precipitation184190210215209217
Humidity/Visibility180184205210207215


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.

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