Tribhuvan Intl. Airport (1337m)





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax521438479475481476
Tmin387345380361384378
Duration of sunshine124198186210217180
Precipitation177163174173178170
Humidity/Visibility1181051101039989


ParameterJulAugSepOctNovDec
Tmax485485496481447464
Tmin387385383404371378
Duration of sunshine186248210155120155
Precipitation179177196182169167
Humidity/Visibility111112125109122131


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.