World

Asia

Al Ahsa AP (178m)





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax803752832822850837
Tmin803754833824853837
Duration of sunshine898188100113113
Precipitation343310341349374361
Humidity/Visibility918391103122118


ParameterJulAugSepOctNovDec
Tmax865865822858837866
Tmin866866824860837868
Duration of sunshine121120117114109116
Precipitation373373360370360373
Humidity/Visibility122121118117117123


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.