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Africa

Djelfa/Tletsi AP (1144m)





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax98768410311084
Tmin97768510111188
Duration of sunshine186197217240217240
Precipitation137122148171160159
Humidity/Visibility837786100106103


ParameterJulAugSepOctNovDec
Tmax827585715460
Tmin877883705260
Duration of sunshine186248240248240155
Precipitation161164163157138134
Humidity/Visibility1061021011028189


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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