Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 603 | 565 | 638 | 609 | 627 | 627 |
Tmin | 616 | 565 | 643 | 612 | 634 | 631 |
Duration of sunshine | 155 | 169 | 186 | 150 | 217 | 270 |
Precipitation | 587 | 529 | 582 | 592 | 639 | 622 |
Humidity/Visibility | 92 | 91 | 106 | 109 | 126 | 129 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 642 | 631 | 639 | 652 | 608 | 632 |
Tmin | 650 | 643 | 640 | 652 | 610 | 649 |
Duration of sunshine | 279 | 155 | 240 | 124 | 60 | 124 |
Precipitation | 630 | 637 | 590 | 613 | 620 | 630 |
Humidity/Visibility | 131 | 118 | 131 | 130 | 115 | 120 |
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. |