Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 688 | 613 | 670 | 658 | 690 | 670 |
Tmin | 688 | 628 | 677 | 656 | 679 | 660 |
Duration of sunshine | 183 | 115 | 171 | 169 | 112 | 83 |
Precipitation | 621 | 557 | 626 | 635 | 651 | 622 |
Humidity/Visibility | 58 | 45 | 38 | 39 | 49 | 52 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 669 | 649 | 634 | 647 | 640 | 683 |
Tmin | 680 | 675 | 670 | 670 | 649 | 685 |
Duration of sunshine | 117 | 112 | 150 | 197 | 108 | 147 |
Precipitation | 623 | 602 | 596 | 600 | 602 | 657 |
Humidity/Visibility | 44 | 30 | 39 | 30 | 30 | 45 |
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. |