Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1919 | 1734 | 1915 | 1865 | 1914 | 1849 |
| Tmin | 1861 | 1682 | 1862 | 1800 | 1860 | 1803 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 65 | 59 | 65 | 92 | 96 | 96 |
| Humidity/Visibility | 56 | 52 | 57 | 65 | 80 | 75 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1914 | 1917 | 1853 | 1914 | 1846 | 1915 |
| Tmin | 1861 | 1860 | 1800 | 1860 | 1800 | 1860 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 98 | 99 | 101 | 93 | 91 | 100 |
| Humidity/Visibility | 80 | 84 | 78 | 75 | 68 | 80 |
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. |
