Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1233 | 1146 | 1268 | 1226 | 1266 | 1230 |
| Tmin | 1232 | 1147 | 1268 | 1227 | 1266 | 1226 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 810 | 731 | 807 | 783 | 808 | 780 |
| Humidity/Visibility | 158 | 142 | 165 | 163 | 161 | 155 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1239 | 1241 | 1217 | 1281 | 1226 | 1295 |
| Tmin | 1264 | 1261 | 1250 | 1294 | 1224 | 1297 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 808 | 808 | 815 | 844 | 813 | 842 |
| Humidity/Visibility | 136 | 138 | 160 | 173 | 154 | 178 |
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. |
