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Europe

Lisbon (105m)





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax184165181175184179
Tmin185167184179186176
Duration of sunshine184158176179184175
Precipitation186169189181186180
Humidity/Visibility184168184178184178


ParameterJulAugSepOctNovDec
Tmax183185205209207218
Tmin185187207211207217
Duration of sunshine183185207207202213
Precipitation186190212215210217
Humidity/Visibility184186206210207216


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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