Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1958 | 1771 | 1971 | 1901 | 1967 | 1904 |
| Tmin | 1862 | 1683 | 1867 | 1806 | 1861 | 1803 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 129 | 119 | 129 | 132 | 131 | 131 |
| Humidity/Visibility | 106 | 92 | 110 | 102 | 107 | 104 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1939 | 1914 | 1841 | 1914 | 1857 | 1909 |
| Tmin | 1864 | 1860 | 1802 | 1860 | 1800 | 1860 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 129 | 143 | 127 | 130 | 128 | 137 |
| Humidity/Visibility | 102 | 99 | 90 | 104 | 105 | 88 |
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. |
