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Istanbul





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax125411441267122212631227
Tmin125211461265122412611228
Duration of sunshine000000
Precipitation189172188183188180
Humidity/Visibility182166183176181178


ParameterJulAugSepOctNovDec
Tmax126612681253129012511294
Tmin126312681254129412541300
Duration of sunshine000000
Precipitation188190212217210222
Humidity/Visibility182183206209205213


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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