World

North America

Montreal Airport Trudeau





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax829756834809829806
Tmin831757837809837809
Duration of sunshine12411393120124150
Precipitation183169187181186180
Humidity/Visibility182167183176184178


ParameterJulAugSepOctNovDec
Tmax833835833865837866
Tmin837836834864836867
Duration of sunshine12412616018612093
Precipitation188190208215211217
Humidity/Visibility184182205210206210


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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