Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 2086 | 1891 | 2091 | 2024 | 2076 | 2025 |
| Tmin | 2091 | 1902 | 2101 | 2028 | 2080 | 2028 |
| Duration of sunshine | 93 | 57 | 62 | 60 | 124 | 150 |
| Precipitation | 186 | 168 | 190 | 181 | 187 | 180 |
| Humidity/Visibility | 179 | 162 | 173 | 167 | 171 | 168 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 2087 | 2096 | 2052 | 2120 | 2049 | 2118 |
| Tmin | 2103 | 2093 | 2059 | 2127 | 2058 | 2121 |
| Duration of sunshine | 155 | 124 | 120 | 124 | 90 | 93 |
| Precipitation | 187 | 194 | 212 | 216 | 212 | 218 |
| Humidity/Visibility | 169 | 171 | 189 | 198 | 204 | 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. |
