Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 2095 | 1895 | 2089 | 2026 | 2079 | 2027 |
| Tmin | 2096 | 1894 | 2096 | 2015 | 2068 | 2032 |
| Duration of sunshine | 124 | 113 | 124 | 120 | 155 | 180 |
| Precipitation | 186 | 169 | 187 | 181 | 186 | 180 |
| Humidity/Visibility | 180 | 164 | 178 | 171 | 174 | 172 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 2093 | 2091 | 2058 | 2124 | 2059 | 2130 |
| Tmin | 2103 | 2100 | 2062 | 2129 | 2066 | 2135 |
| Duration of sunshine | 186 | 186 | 180 | 186 | 120 | 124 |
| Precipitation | 188 | 190 | 210 | 215 | 210 | 217 |
| Humidity/Visibility | 173 | 176 | 195 | 202 | 202 | 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. |
