Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 837 | 756 | 837 | 814 | 844 | 810 |
| Tmin | 837 | 756 | 837 | 814 | 845 | 810 |
| Duration of sunshine | 186 | 197 | 217 | 210 | 217 | 150 |
| Precipitation | 35 | 29 | 36 | 65 | 77 | 90 |
| Humidity/Visibility | 29 | 28 | 29 | 15 | 43 | 55 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 837 | 837 | 810 | 837 | 810 | 837 |
| Tmin | 837 | 837 | 810 | 837 | 810 | 837 |
| Duration of sunshine | 217 | 186 | 210 | 248 | 180 | 217 |
| Precipitation | 93 | 93 | 63 | 60 | 82 | 79 |
| Humidity/Visibility | 51 | 50 | 58 | 35 | 59 | 47 |
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. |
