Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 782 | 698 | 788 | 764 | 801 | 765 |
Tmin | 776 | 697 | 776 | 765 | 802 | 768 |
Duration of sunshine | 351 | 264 | 298 | 323 | 377 | 325 |
Precipitation | 623 | 569 | 623 | 633 | 671 | 648 |
Humidity/Visibility | 97 | 87 | 103 | 105 | 116 | 106 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 798 | 795 | 785 | 799 | 749 | 780 |
Tmin | 799 | 786 | 777 | 796 | 741 | 777 |
Duration of sunshine | 320 | 281 | 369 | 378 | 223 | 371 |
Precipitation | 664 | 664 | 658 | 669 | 622 | 634 |
Humidity/Visibility | 114 | 109 | 125 | 121 | 81 | 96 |
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. |