Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1976 | 1795 | 1986 | 1938 | 2046 | 1977 |
| Tmin | 2001 | 1815 | 2006 | 1961 | 2058 | 1990 |
| Duration of sunshine | 248 | 254 | 217 | 240 | 217 | 210 |
| Precipitation | 117 | 106 | 117 | 126 | 147 | 137 |
| Humidity/Visibility | 56 | 52 | 54 | 68 | 104 | 98 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 2024 | 2022 | 1947 | 2011 | 1961 | 2015 |
| Tmin | 2054 | 2057 | 1971 | 2041 | 1980 | 2020 |
| Duration of sunshine | 279 | 248 | 270 | 279 | 240 | 248 |
| Precipitation | 142 | 151 | 121 | 132 | 144 | 133 |
| Humidity/Visibility | 88 | 87 | 101 | 81 | 102 | 76 |
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. |
