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Siedlce (155m)





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax700632704670676656
Tmin701636705668678659
Duration of sunshine626798828784
Precipitation682616682661685660
Humidity/Visibility112101114105112108


ParameterJulAugSepOctNovDec
Tmax684707684699678704
Tmin684708682698684703
Duration of sunshine9111999855747
Precipitation686715692705659684
Humidity/Visibility117139136129109116


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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