World

North America

Des Moines Intl. Airport (294m)





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax212319222126205721122056
Tmin213319262134205821142060
Duration of sunshine62576260124150
Precipitation187169187181186180
Humidity/Visibility184166184176183177


ParameterJulAugSepOctNovDec
Tmax212321242086215620942172
Tmin213021282091216220992175
Duration of sunshine1551241201249062
Precipitation188190210215210217
Humidity/Visibility183184204208205215


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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