Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1252 | 1148 | 1265 | 1226 | 1268 | 1226 |
| Tmin | 1252 | 1146 | 1264 | 1228 | 1270 | 1224 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 806 | 728 | 807 | 781 | 808 | 780 |
| Humidity/Visibility | 183 | 166 | 184 | 179 | 184 | 178 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1269 | 1267 | 1254 | 1292 | 1254 | 1300 |
| Tmin | 1270 | 1272 | 1250 | 1295 | 1255 | 1299 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 806 | 810 | 812 | 835 | 810 | 217 |
| Humidity/Visibility | 183 | 184 | 206 | 209 | 206 | 214 |
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. |
