Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1422 | 1287 | 1420 | 1380 | 1436 | 1397 |
| Tmin | 1424 | 1288 | 1418 | 1379 | 1437 | 1398 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 64 | 59 | 64 | 62 | 83 | 104 |
| Humidity/Visibility | 58 | 54 | 56 | 59 | 71 | 76 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1449 | 1442 | 1406 | 1447 | 1396 | 1450 |
| Tmin | 1445 | 1446 | 1403 | 1449 | 1394 | 1454 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 101 | 98 | 95 | 91 | 96 | 96 |
| Humidity/Visibility | 85 | 86 | 85 | 78 | 81 | 90 |
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. |
