Belém





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax585557555667
Tmin625559606168
Duration of sunshine585358565654
Precipitation9489989396111
Humidity/Visibility444044434450


ParameterJulAugSepOctNovDec
Tmax788584867686
Tmin888989897992
Duration of sunshine718584867685
Precipitation129129120126124124
Humidity/Visibility626464625967


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.