Mondo

America del Nord

Aeroporto Internazionale di Washington-Dulles





Number of days available for climatic review

ParametroGenFebMarAprMagGiu
Tmax161714761624157716041575
Tmin162614821638158116071582
Durata del soleggiamento000000
Precipitazione186169187181186180
Umidità/Visibilità177160176171174171


ParametroLugAgoSetOttNovDic
Tmax162416271609165816111668
Tmin163416321613166416181667
Durata del soleggiamento000000
Precipitazione188190210215210217
Umidità/Visibilità171175193202201215


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.

Previsione

Reston