World

Africa

Durban/Louis Botha AP





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax124811491270122912681228
Tmin125111501269122812711229
Duration of sunshine248254248210217240
Precipitation186169187181186180
Humidity/Visibility184166183177184178


ParameterJulAugSepOctNovDec
Tmax126712691255129412511303
Tmin126812721257129512571302
Duration of sunshine310310300310240248
Precipitation186190212215210217
Humidity/Visibility183185206210205214


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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