Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1241 | 1146 | 1269 | 1227 | 1270 | 1228 |
| Tmin | 1245 | 1150 | 1269 | 1227 | 1270 | 1226 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 853 | 785 | 883 | 860 | 895 | 864 |
| Humidity/Visibility | 179 | 160 | 172 | 167 | 170 | 166 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1260 | 1261 | 1249 | 1293 | 1244 | 1275 |
| Tmin | 1260 | 1261 | 1250 | 1294 | 1244 | 1273 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 865 | 876 | 871 | 891 | 840 | 871 |
| Humidity/Visibility | 170 | 167 | 200 | 202 | 201 | 181 |
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. |
