Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 89 | 82 | 91 | 85 | 91 | 102 |
| Tmin | 91 | 83 | 86 | 86 | 91 | 100 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 33 | 35 | 37 | 37 | 20 | 10 |
| Humidity/Visibility | 91 | 84 | 90 | 88 | 92 | 101 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 117 | 118 | 117 | 117 | 111 | 121 |
| Tmin | 119 | 120 | 116 | 115 | 116 | 121 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 17 | 14 | 11 | 34 | 45 | 47 |
| Humidity/Visibility | 121 | 120 | 117 | 117 | 115 | 122 |
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. |
