Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 82 | 58 | 69 | 63 | 78 | 77 |
| Tmin | 110 | 76 | 92 | 82 | 87 | 92 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 130 | 116 | 121 | 115 | 128 | 125 |
| Humidity/Visibility | 88 | 60 | 67 | 70 | 80 | 78 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 67 | 70 | 71 | 76 | 66 | 93 |
| Tmin | 95 | 96 | 92 | 93 | 80 | 108 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 133 | 126 | 124 | 114 | 124 | 138 |
| Humidity/Visibility | 79 | 83 | 80 | 82 | 73 | 99 |
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. |
