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World

Oceania

Sydney (IAP)





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax214219582148207921692100
Tmin213119352139207621672097
Duration of sunshine248254217270279240
Precipitation117106117114116108
Humidity/Visibility545355608480


ParameterJulAugSepOctNovDec
Tmax216421612097217120992170
Tmin216421592098216820992168
Duration of sunshine310248300279240248
Precipitation111122116127119130
Humidity/Visibility7167747410270


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.