Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1483 | 1358 | 1497 | 1455 | 1476 | 1449 |
| Tmin | 1495 | 1369 | 1507 | 1456 | 1472 | 1456 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 186 | 170 | 187 | 181 | 186 | 181 |
| Humidity/Visibility | 172 | 159 | 176 | 170 | 172 | 169 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1501 | 1501 | 1482 | 1534 | 1492 | 1525 |
| Tmin | 1505 | 1499 | 1486 | 1536 | 1496 | 1529 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 188 | 190 | 210 | 215 | 210 | 217 |
| Humidity/Visibility | 170 | 175 | 190 | 197 | 186 | 208 |
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. |
