Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1998 | 1796 | 2000 | 1940 | 1987 | 1936 |
| Tmin | 1998 | 1804 | 1993 | 1935 | 1983 | 1927 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 136 | 121 | 139 | 141 | 135 | 144 |
| Humidity/Visibility | 110 | 104 | 117 | 111 | 102 | 106 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 2009 | 2033 | 1964 | 2024 | 1962 | 2024 |
| Tmin | 1998 | 2014 | 1955 | 2010 | 1957 | 2011 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 140 | 180 | 171 | 180 | 172 | 178 |
| Humidity/Visibility | 116 | 143 | 139 | 131 | 138 | 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. |
