World

North America

Detroit Metropolitan Airport (202m)





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax172115571726169017341693
Tmin172615641728168717361699
Duration of sunshine62576260124150
Precipitation155141156172186180
Humidity/Visibility154139153167181177


ParameterJulAugSepOctNovDec
Tmax174117471695175717011761
Tmin175517501706175817061758
Duration of sunshine1559390936062
Precipitation187189181184194203
Humidity/Visibility181181177179186193


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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