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Lyon- Bron Airport (202m)





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax651588674657682631
Tmin651588660656680632
Duration of sunshine9385124150186150
Precipitation938511612112492
Humidity/Visibility001412150


ParameterJulAugSepOctNovDec
Tmax651654654681660682
Tmin651653660682660682
Duration of sunshine186155150186120124
Precipitation93939089120128
Humidity/Visibility11514141414


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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