Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 573 | 511 | 564 | 553 | 570 | 555 |
Tmin | 568 | 519 | 567 | 550 | 567 | 551 |
Duration of sunshine | 120 | 105 | 125 | 125 | 129 | 131 |
Precipitation | 539 | 487 | 537 | 523 | 536 | 525 |
Humidity/Visibility | 137 | 124 | 130 | 128 | 132 | 132 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 569 | 596 | 565 | 576 | 556 | 567 |
Tmin | 572 | 593 | 576 | 582 | 553 | 569 |
Duration of sunshine | 138 | 156 | 154 | 139 | 129 | 122 |
Precipitation | 538 | 575 | 550 | 569 | 527 | 174 |
Humidity/Visibility | 140 | 157 | 154 | 144 | 135 | 136 |
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. |