Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 648 | 591 | 643 | 626 | 641 | 627 |
Tmin | 664 | 600 | 660 | 639 | 666 | 633 |
Duration of sunshine | 100 | 91 | 100 | 98 | 104 | 89 |
Precipitation | 131 | 131 | 132 | 123 | 134 | 149 |
Humidity/Visibility | 85 | 83 | 86 | 79 | 86 | 78 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 658 | 656 | 628 | 650 | 625 | 660 |
Tmin | 655 | 660 | 632 | 648 | 634 | 666 |
Duration of sunshine | 94 | 101 | 90 | 88 | 90 | 105 |
Precipitation | 139 | 139 | 135 | 131 | 137 | 142 |
Humidity/Visibility | 90 | 88 | 79 | 77 | 78 | 90 |
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. |