Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1216 | 1109 | 1231 | 1188 | 1230 | 1193 |
| Tmin | 1225 | 1119 | 1232 | 1193 | 1235 | 1193 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 777 | 703 | 778 | 751 | 777 | 750 |
| Humidity/Visibility | 182 | 167 | 184 | 177 | 183 | 178 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1227 | 1232 | 1215 | 1251 | 1215 | 1254 |
| Tmin | 1235 | 1240 | 1222 | 1260 | 1222 | 1263 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 775 | 779 | 782 | 804 | 781 | 806 |
| Humidity/Visibility | 182 | 184 | 205 | 206 | 207 | 212 |
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. |
