Mundo

Europa

Oporto/Pedras Rubras





Number of days available for climatic review

Parámetroenefebmarabrmayjun
Tmáx115810631168113811771139
Tmín116010651172113811781137
Duración del tiempo soleado184161175161182169
Precipitación186169189181186180
Humedad/Visibilidad185167184178185178


Parámetrojulagosepoctnovdic
Tmáx117611751165120211681211
Tmín117811791169120411591207
Duración del tiempo soleado176172199188172213
Precipitación186189210215210217
Humedad/Visibilidad184185205208181214


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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