Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1776 | 1626 | 1798 | 1737 | 1788 | 1740 |
| Tmin | 1591 | 1459 | 1612 | 1560 | 1604 | 1560 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 186 | 167 | 187 | 179 | 184 | 180 |
| Humidity/Visibility | 185 | 168 | 185 | 179 | 184 | 179 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1795 | 1796 | 1755 | 1822 | 1767 | 1828 |
| Tmin | 1613 | 1612 | 1547 | 1612 | 1560 | 1612 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 185 | 186 | 208 | 211 | 208 | 216 |
| Humidity/Visibility | 183 | 185 | 207 | 211 | 207 | 215 |
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. |
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