Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 246 | 222 | 247 | 236 | 247 | 239 |
| Tmin | 248 | 222 | 248 | 239 | 247 | 236 |
| Duration of sunshine | 62 | 54 | 52 | 41 | 37 | 46 |
| Precipitation | 0 | 0 | 0 | 0 | 0 | 0 |
| Humidity/Visibility | 0 | 0 | 0 | 0 | 0 | 0 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 239 | 249 | 240 | 268 | 267 | 278 |
| Tmin | 237 | 248 | 238 | 266 | 267 | 279 |
| Duration of sunshine | 25 | 29 | 35 | 40 | 37 | 45 |
| 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. |
