Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 2082 | 1896 | 2097 | 2031 | 2076 | 2031 |
| Tmin | 2082 | 1903 | 2104 | 2026 | 2077 | 2030 |
| Duration of sunshine | 62 | 57 | 62 | 60 | 124 | 150 |
| Precipitation | 187 | 169 | 187 | 181 | 186 | 180 |
| Humidity/Visibility | 181 | 164 | 180 | 172 | 177 | 171 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 2097 | 2099 | 2055 | 2126 | 2064 | 2129 |
| Tmin | 2101 | 2101 | 2061 | 2131 | 2069 | 2132 |
| Duration of sunshine | 155 | 124 | 120 | 124 | 90 | 62 |
| Precipitation | 186 | 190 | 210 | 216 | 210 | 218 |
| Humidity/Visibility | 174 | 177 | 195 | 203 | 200 | 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. |
