Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1135 | 1043 | 1165 | 1133 | 1171 | 1138 |
| Tmin | 1135 | 1047 | 1169 | 1135 | 1167 | 1132 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 681 | 616 | 683 | 661 | 682 | 661 |
| Humidity/Visibility | 134 | 123 | 146 | 145 | 150 | 144 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1171 | 1182 | 1142 | 1176 | 1140 | 1163 |
| Tmin | 1171 | 1181 | 1149 | 1183 | 1150 | 1159 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 691 | 713 | 683 | 701 | 679 | 687 |
| Humidity/Visibility | 149 | 159 | 153 | 154 | 151 | 139 |
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. |
