Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1236 | 1133 | 1251 | 1184 | 1210 | 1188 |
| Tmin | 1239 | 1135 | 1256 | 1187 | 1213 | 1190 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 818 | 733 | 830 | 808 | 834 | 802 |
| Humidity/Visibility | 139 | 123 | 129 | 114 | 122 | 127 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1219 | 1244 | 1203 | 1247 | 1212 | 1226 |
| Tmin | 1229 | 1254 | 1208 | 1251 | 1222 | 1228 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 839 | 841 | 829 | 852 | 823 | 870 |
| Humidity/Visibility | 115 | 148 | 156 | 161 | 160 | 149 |
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. |
