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Chlef (143m)





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax9998102115118128
Tmin10595100111123124
Duration of sunshine224257252245313276
Precipitation138122141176167166
Humidity/Visibility107102103117130130


ParameterJulAugSepOctNovDec
Tmax111105117123108109
Tmin11811712812294109
Duration of sunshine250219245316182283
Precipitation177168162168141154
Humidity/Visibility121111122127102115


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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