Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1445 | 1308 | 1445 | 1402 | 1431 | 1400 |
| Tmin | 1451 | 1312 | 1452 | 1404 | 1435 | 1401 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 156 | 141 | 156 | 151 | 155 | 150 |
| Humidity/Visibility | 152 | 138 | 153 | 148 | 152 | 147 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1445 | 1443 | 1400 | 1478 | 1434 | 1481 |
| Tmin | 1453 | 1447 | 1408 | 1480 | 1438 | 1483 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 156 | 157 | 152 | 184 | 180 | 186 |
| Humidity/Visibility | 151 | 151 | 146 | 178 | 176 | 183 |
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. |
