Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1607 | 1456 | 1609 | 1569 | 1638 | 1575 |
| Tmin | 1551 | 1400 | 1550 | 1502 | 1550 | 1501 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 62 | 57 | 62 | 81 | 93 | 91 |
| Humidity/Visibility | 60 | 55 | 61 | 72 | 87 | 85 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1636 | 1634 | 1584 | 1636 | 1580 | 1637 |
| Tmin | 1551 | 1552 | 1502 | 1550 | 1500 | 1550 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 98 | 98 | 91 | 93 | 92 | 97 |
| Humidity/Visibility | 90 | 88 | 86 | 82 | 82 | 87 |
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. |
