Monde

Europe

Helgoland/Düne





Number of days available for climatic review

Paramètrejanfevmaravrmaijuin
Tmax164314951643159016431590
Tmin164314951643159016431590
Durée d’insolation130211831301125813011258
Précipitation498448496481496480
Humidité/Visibilité184167185179185179


Paramètrejuilletaoûtsepoctnovdéc
Tmax164316431590164315901643
Tmin164316431590164315901643
Durée d’insolation130113051289132512871332
Précipitation498500510525510527
Humidité/Visibilité184184207210207215


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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