Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1612 | 1456 | 1612 | 1560 | 1612 | 1560 |
| Tmin | 1550 | 1400 | 1550 | 1500 | 1550 | 1500 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 0 | 0 | 0 | 28 | 31 | 30 |
| Humidity/Visibility | 0 | 0 | 0 | 26 | 30 | 30 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1612 | 1612 | 1573 | 1643 | 1590 | 1642 |
| Tmin | 1550 | 1550 | 1505 | 1581 | 1530 | 1581 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 31 | 9 | 30 | 31 | 30 | 31 |
| Humidity/Visibility | 30 | 8 | 30 | 31 | 30 | 31 |
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. |
