Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 880 | 786 | 876 | 849 | 860 | 852 |
| Tmin | 844 | 778 | 857 | 830 | 848 | 832 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 155 | 126 | 141 | 138 | 133 | 135 |
| Humidity/Visibility | 57 | 57 | 57 | 56 | 53 | 55 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 879 | 876 | 841 | 857 | 846 | 869 |
| Tmin | 847 | 846 | 823 | 850 | 833 | 853 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 141 | 144 | 139 | 128 | 141 | 192 |
| Humidity/Visibility | 51 | 47 | 47 | 42 | 52 | 51 |
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. |
