Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 2086 | 1897 | 2091 | 2029 | 2073 | 2029 |
| Tmin | 2087 | 1899 | 2093 | 2030 | 2070 | 2030 |
| Duration of sunshine | 124 | 113 | 124 | 120 | 124 | 120 |
| Precipitation | 186 | 169 | 187 | 181 | 186 | 180 |
| Humidity/Visibility | 180 | 163 | 178 | 171 | 175 | 172 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 2096 | 2088 | 2052 | 2121 | 2062 | 2129 |
| Tmin | 2104 | 2092 | 2061 | 2126 | 2068 | 2129 |
| Duration of sunshine | 124 | 155 | 120 | 124 | 90 | 124 |
| Precipitation | 188 | 190 | 210 | 216 | 210 | 218 |
| Humidity/Visibility | 173 | 176 | 195 | 203 | 200 | 212 |
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. |
