Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 617 | 559 | 617 | 594 | 618 | 596 |
| Tmin | 620 | 557 | 619 | 599 | 618 | 596 |
| Duration of sunshine | 186 | 195 | 177 | 158 | 158 | 194 |
| Precipitation | 0 | 0 | 0 | 0 | 0 | 0 |
| Humidity/Visibility | 0 | 0 | 0 | 0 | 0 | 0 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 606 | 619 | 599 | 625 | 599 | 620 |
| Tmin | 610 | 620 | 599 | 624 | 600 | 621 |
| Duration of sunshine | 178 | 216 | 190 | 194 | 155 | 170 |
| Precipitation | 0 | 0 | 0 | 0 | 0 | 0 |
| Humidity/Visibility | 0 | 0 | 0 | 0 | 0 | 0 |
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. |
