Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1918 | 1734 | 1921 | 1869 | 1951 | 1882 |
| Tmin | 1863 | 1681 | 1860 | 1802 | 1860 | 1801 |
| Duration of sunshine | 124 | 141 | 93 | 150 | 124 | 120 |
| Precipitation | 63 | 57 | 62 | 77 | 95 | 92 |
| Humidity/Visibility | 60 | 54 | 60 | 72 | 90 | 86 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1949 | 1949 | 1887 | 1943 | 1883 | 1946 |
| Tmin | 1861 | 1862 | 1801 | 1861 | 1800 | 1860 |
| Duration of sunshine | 124 | 155 | 150 | 186 | 150 | 124 |
| Precipitation | 96 | 103 | 92 | 93 | 94 | 93 |
| Humidity/Visibility | 90 | 88 | 86 | 82 | 84 | 88 |
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. |
