Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1359 | 1235 | 1378 | 1318 | 1364 | 1311 |
| Tmin | 1350 | 1224 | 1356 | 1308 | 1353 | 1276 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 44 | 37 | 39 | 34 | 39 | 34 |
| Humidity/Visibility | 130 | 122 | 133 | 130 | 136 | 134 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1338 | 1328 | 1301 | 1339 | 1309 | 1333 |
| Tmin | 1315 | 1313 | 1279 | 1338 | 1307 | 1331 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 40 | 57 | 39 | 45 | 41 | 12 |
| Humidity/Visibility | 136 | 131 | 136 | 137 | 135 | 125 |
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. |
