Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 2099 | 1900 | 2101 | 2032 | 2102 | 2030 |
| Tmin | 2103 | 1902 | 2106 | 2037 | 2105 | 2033 |
| Duration of sunshine | 124 | 114 | 93 | 90 | 155 | 180 |
| Precipitation | 186 | 169 | 187 | 181 | 186 | 180 |
| Humidity/Visibility | 179 | 163 | 179 | 176 | 176 | 174 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 2094 | 2103 | 2058 | 2128 | 2060 | 2129 |
| Tmin | 2081 | 2071 | 2032 | 2127 | 2060 | 2132 |
| Duration of sunshine | 186 | 155 | 150 | 155 | 120 | 124 |
| Precipitation | 186 | 189 | 209 | 215 | 209 | 217 |
| Humidity/Visibility | 164 | 167 | 186 | 202 | 193 | 210 |
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. |
