Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1509 | 1354 | 1520 | 1465 | 1521 | 1477 |
| Tmin | 1476 | 1330 | 1469 | 1408 | 1476 | 1444 |
| Duration of sunshine | 155 | 170 | 155 | 150 | 217 | 210 |
| Precipitation | 93 | 85 | 115 | 121 | 124 | 120 |
| Humidity/Visibility | 75 | 68 | 86 | 88 | 97 | 101 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1521 | 1511 | 1471 | 1517 | 1470 | 1498 |
| Tmin | 1491 | 1481 | 1444 | 1486 | 1440 | 1496 |
| Duration of sunshine | 217 | 186 | 210 | 217 | 150 | 186 |
| Precipitation | 127 | 126 | 120 | 122 | 122 | 98 |
| Humidity/Visibility | 104 | 106 | 101 | 99 | 99 | 93 |
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. |
