Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1565 | 1414 | 1569 | 1539 | 1604 | 1551 |
| Tmin | 1565 | 1423 | 1575 | 1536 | 1605 | 1552 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 155 | 141 | 156 | 172 | 186 | 180 |
| Humidity/Visibility | 151 | 136 | 153 | 167 | 176 | 175 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1600 | 1589 | 1536 | 1595 | 1558 | 1598 |
| Tmin | 1603 | 1598 | 1539 | 1596 | 1558 | 1602 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 188 | 188 | 180 | 184 | 180 | 186 |
| Humidity/Visibility | 181 | 178 | 174 | 178 | 176 | 184 |
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. |
