World

North America

Shearwater AP





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax793720792773798777
Tmin795721794774800777
Duration of sunshine387385388410456415
Precipitation178165180178181177
Humidity/Visibility168154168165170174


ParameterJulAugSepOctNovDec
Tmax793794796824799820
Tmin797793801825798821
Duration of sunshine391388438450407415
Precipitation183183204210205204
Humidity/Visibility169168192195192196


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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