Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 640 | 573 | 636 | 620 | 642 | 626 |
Tmin | 646 | 586 | 644 | 626 | 644 | 626 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 130 | 110 | 130 | 142 | 154 | 143 |
Humidity/Visibility | 78 | 74 | 85 | 98 | 105 | 105 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 636 | 618 | 593 | 610 | 595 | 605 |
Tmin | 642 | 620 | 595 | 615 | 598 | 609 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 150 | 159 | 153 | 148 | 120 | 146 |
Humidity/Visibility | 105 | 110 | 105 | 99 | 94 | 97 |
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. |