Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 569 | 524 | 585 | 577 | 602 | 576 |
Tmin | 603 | 558 | 618 | 612 | 645 | 614 |
Duration of sunshine | 66 | 72 | 79 | 84 | 106 | 88 |
Precipitation | 132 | 114 | 127 | 155 | 161 | 154 |
Humidity/Visibility | 61 | 66 | 74 | 85 | 96 | 89 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 607 | 617 | 601 | 617 | 587 | 615 |
Tmin | 644 | 650 | 629 | 632 | 603 | 638 |
Duration of sunshine | 109 | 106 | 106 | 92 | 73 | 100 |
Precipitation | 156 | 158 | 150 | 144 | 147 | 157 |
Humidity/Visibility | 101 | 106 | 102 | 96 | 84 | 98 |
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. |