Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 202 | 193 | 215 | 236 | 242 | 233 |
| Tmin | 264 | 246 | 267 | 285 | 293 | 290 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 97 | 93 | 111 | 128 | 136 | 126 |
| Humidity/Visibility | 43 | 45 | 48 | 63 | 66 | 67 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 226 | 213 | 208 | 216 | 210 | 214 |
| Tmin | 287 | 290 | 292 | 285 | 280 | 296 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 143 | 132 | 128 | 144 | 138 | 140 |
| Humidity/Visibility | 62 | 63 | 61 | 57 | 58 | 61 |
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. |
