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Ασία

Heyuan





Number of days available for climatic review

ΠαράμετροςΙανΦεβ ΜαρΑπρΙουνΙουλ
Tmax339306341345372360
Tmin341307340346372358
Διάρκεια Ηλιοφάνειας000000
Υετός938595109124120
Υγρασία/Ορατότητα 928491104123119


ΠαράμετροςΑυγΣεπΟκτΝοεΔεκ(null)
Tmax369370360364359368
Tmin372371359365358371
Διάρκεια Ηλιοφάνειας000000
Υετός126128120124122124
Υγρασία/Ορατότητα 122121118117118124


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.