Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1205 | 1112 | 1233 | 1183 | 1217 | 1198 |
| Tmin | 1209 | 1111 | 1232 | 1188 | 1219 | 1185 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 748 | 687 | 756 | 731 | 750 | 726 |
| Humidity/Visibility | 178 | 156 | 176 | 170 | 177 | 175 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1228 | 1233 | 1214 | 1260 | 1211 | 1263 |
| Tmin | 1230 | 1230 | 1217 | 1262 | 1217 | 1266 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 748 | 747 | 756 | 777 | 758 | 777 |
| Humidity/Visibility | 181 | 176 | 199 | 204 | 201 | 207 |
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. |
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