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Norteamérica

Seattle-Tacoma aeropuerto (137m)





Number of days available for climatic review

Parámetroenefebmarabrmayjun
Tmáx208818962092203120852033
Tmín208219022104203020822032
Duración del tiempo soleado93869390155180
Precipitación186170187182186180
Humedad/Visibilidad177160175170174170


Parámetrojulagosepoctnovdic
Tmáx209820972057211720642125
Tmín210320992053212020672131
Duración del tiempo soleado1861551501249093
Precipitación188190210206210218
Humedad/Visibilidad171176195192195213


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.