Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 361 | 331 | 361 | 380 | 394 | 383 |
| Tmin | 490 | 444 | 491 | 505 | 524 | 506 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 101 | 96 | 99 | 129 | 125 | 130 |
| Humidity/Visibility | 65 | 59 | 64 | 84 | 87 | 83 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 336 | 398 | 382 | 390 | 368 | 386 |
| Tmin | 463 | 522 | 507 | 518 | 497 | 521 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 123 | 132 | 126 | 127 | 128 | 151 |
| Humidity/Visibility | 43 | 88 | 84 | 83 | 78 | 79 |
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. |
