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Europe

Sliven (257m)





Number of days available for climatic review

ParameterJanFebMarAprMayJun
Tmax643581648623639623
Tmin648583643623646621
Duration of sunshine180160178170181174
Precipitation186170186181185180
Humidity/Visibility182166182177180176


ParameterJulAugSepOctNovDec
Tmax643648651671649677
Tmin647649653673652677
Duration of sunshine179183203204202213
Precipitation186190214214210219
Humidity/Visibility183184204208204215


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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Sliven

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