Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 6624 | 0 | 2461447 | 0 | 200 | 0 |
| Tmin | 2423860 | 0 | 5440832 | 0 | 541297280 | 8 |
| Duration of sunshine | -1719623672 | 8590 | 73728 | 0 | 1471566758 | 1162481015 |
| Precipitation | -1719629816 | 8590 | -1719628792 | 8590 | -1719627768 | 8590 |
| Humidity/Visibility | -1719652344 | 8590 | -1719651320 | 8590 | -1719650296 | 8590 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | -1715175104 | 8590 | 0 | 0 | 0 | 0 |
| Tmin | 706049838 | 8 | -1717554632 | 8590 | -670979552 | 9397 |
| Duration of sunshine | 255 | 0 | 706906704 | 8 | 254 | 0 |
| Precipitation | -1719626744 | 8590 | 541297184 | 8 | 706610655 | 8 |
| Humidity/Visibility | -1719649272 | 8590 | -1719631864 | 8590 | -1719630840 | 8590 |
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. |
