Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 620 | 561 | 618 | 614 | 649 | 627 |
Tmin | 619 | 560 | 619 | 615 | 647 | 627 |
Duration of sunshine | 59 | 56 | 60 | 70 | 80 | 86 |
Precipitation | 62 | 59 | 62 | 75 | 95 | 91 |
Humidity/Visibility | 61 | 56 | 60 | 73 | 90 | 88 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 648 | 649 | 630 | 644 | 623 | 650 |
Tmin | 646 | 648 | 627 | 643 | 628 | 650 |
Duration of sunshine | 82 | 86 | 83 | 74 | 83 | 89 |
Precipitation | 94 | 96 | 92 | 90 | 90 | 94 |
Humidity/Visibility | 88 | 89 | 87 | 85 | 87 | 92 |
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. |