Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 2066 | 1872 | 2064 | 2023 | 2082 | 2030 |
| Tmin | 2071 | 1874 | 2074 | 2026 | 2085 | 2037 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 156 | 142 | 156 | 172 | 186 | 180 |
| Humidity/Visibility | 153 | 139 | 154 | 168 | 182 | 177 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 2087 | 2087 | 2028 | 2095 | 2029 | 2103 |
| Tmin | 2105 | 2102 | 2037 | 2098 | 2035 | 2104 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 188 | 188 | 180 | 184 | 184 | 186 |
| Humidity/Visibility | 182 | 181 | 178 | 179 | 174 | 185 |
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. |
