Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 651 | 588 | 674 | 657 | 682 | 631 |
| Tmin | 651 | 588 | 660 | 656 | 680 | 632 |
| Duration of sunshine | 93 | 85 | 124 | 150 | 186 | 150 |
| Precipitation | 93 | 85 | 116 | 121 | 124 | 92 |
| Humidity/Visibility | 0 | 0 | 14 | 12 | 15 | 0 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 651 | 654 | 654 | 681 | 660 | 682 |
| Tmin | 651 | 653 | 660 | 682 | 660 | 682 |
| Duration of sunshine | 186 | 155 | 150 | 186 | 120 | 124 |
| Precipitation | 93 | 93 | 90 | 89 | 120 | 128 |
| Humidity/Visibility | 1 | 15 | 14 | 14 | 14 | 14 |
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. |
