Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1811 | 1642 | 1817 | 1759 | 1801 | 1757 |
| Tmin | 1814 | 1644 | 1823 | 1756 | 1803 | 1752 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 155 | 141 | 156 | 151 | 155 | 150 |
| Humidity/Visibility | 144 | 134 | 145 | 141 | 144 | 141 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1812 | 1807 | 1758 | 1847 | 1787 | 1846 |
| Tmin | 1811 | 1803 | 1760 | 1846 | 1797 | 1847 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 157 | 157 | 152 | 184 | 182 | 188 |
| Humidity/Visibility | 141 | 137 | 138 | 171 | 172 | 182 |
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. |
