Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1132 | 1032 | 1165 | 1131 | 1168 | 1130 |
| Tmin | 1101 | 1005 | 1139 | 1106 | 1140 | 1100 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 184 | 168 | 187 | 180 | 187 | 180 |
| Humidity/Visibility | 168 | 154 | 167 | 165 | 171 | 166 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1165 | 1160 | 1158 | 1197 | 1161 | 1165 |
| Tmin | 1140 | 1137 | 1126 | 1166 | 1134 | 1157 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 186 | 189 | 207 | 213 | 210 | 187 |
| Humidity/Visibility | 172 | 174 | 194 | 199 | 195 | 184 |
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. |
