Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1015 | 920 | 1044 | 1015 | 1053 | 1019 |
| Tmin | 1018 | 925 | 1044 | 1016 | 1054 | 1016 |
| Duration of sunshine | 62 | 54 | 49 | 37 | 38 | 42 |
| Precipitation | 527 | 476 | 527 | 510 | 527 | 510 |
| Humidity/Visibility | 0 | 0 | 0 | 0 | 0 | 0 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1027 | 1024 | 1001 | 1036 | 1016 | 1025 |
| Tmin | 1035 | 1043 | 1015 | 1036 | 1011 | 1025 |
| Duration of sunshine | 21 | 29 | 42 | 44 | 30 | 53 |
| Precipitation | 527 | 527 | 510 | 527 | 510 | 527 |
| Humidity/Visibility | 0 | 0 | 0 | 0 | 0 | 0 |
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. |
