Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1102 | 1018 | 1107 | 1112 | 1142 | 1104 |
| Tmin | 1115 | 1025 | 1115 | 1121 | 1144 | 1114 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 639 | 589 | 654 | 647 | 669 | 644 |
| Humidity/Visibility | 77 | 71 | 76 | 103 | 103 | 103 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1143 | 1146 | 1090 | 1141 | 1101 | 1149 |
| Tmin | 1159 | 1154 | 1111 | 1143 | 1109 | 1165 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 659 | 664 | 643 | 660 | 655 | 159 |
| Humidity/Visibility | 104 | 108 | 104 | 101 | 91 | 105 |
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. |
