Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 2026 | 1839 | 2024 | 1968 | 2018 | 1968 |
| Tmin | 2035 | 1843 | 2035 | 1967 | 2019 | 1968 |
| Duration of sunshine | 93 | 86 | 93 | 90 | 155 | 180 |
| Precipitation | 186 | 169 | 187 | 181 | 186 | 180 |
| Humidity/Visibility | 176 | 161 | 175 | 170 | 173 | 170 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 2022 | 2031 | 1996 | 2060 | 1993 | 2054 |
| Tmin | 2037 | 2033 | 2002 | 2062 | 2003 | 2059 |
| Duration of sunshine | 155 | 124 | 120 | 124 | 90 | 93 |
| Precipitation | 188 | 190 | 210 | 215 | 210 | 217 |
| Humidity/Visibility | 171 | 176 | 194 | 200 | 205 | 216 |
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. |
