Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1970 | 1790 | 1979 | 1918 | 1970 | 1916 |
| Tmin | 1951 | 1775 | 1966 | 1903 | 1956 | 1895 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 188 | 169 | 187 | 181 | 186 | 180 |
| Humidity/Visibility | 166 | 151 | 171 | 166 | 168 | 162 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1974 | 1981 | 1938 | 2009 | 1947 | 2005 |
| Tmin | 1959 | 1961 | 1920 | 1991 | 1941 | 2008 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 189 | 191 | 210 | 215 | 211 | 217 |
| Humidity/Visibility | 165 | 166 | 186 | 195 | 198 | 208 |
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. |
