Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1330 | 1201 | 1331 | 1288 | 1328 | 1289 |
| Tmin | 2193 | 1985 | 2195 | 2126 | 2200 | 2127 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 154 | 139 | 152 | 146 | 146 | 143 |
| Humidity/Visibility | 151 | 138 | 153 | 148 | 153 | 148 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1327 | 1329 | 1285 | 1327 | 1285 | 1332 |
| Tmin | 2199 | 2199 | 2128 | 2192 | 2125 | 2196 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 150 | 153 | 150 | 152 | 149 | 155 |
| Humidity/Visibility | 152 | 150 | 146 | 148 | 146 | 153 |
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. |
