Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 662 | 622 | 687 | 675 | 695 | 720 |
Tmin | 662 | 620 | 685 | 678 | 695 | 717 |
Duration of sunshine | 217 | 226 | 248 | 270 | 310 | 300 |
Precipitation | 93 | 85 | 95 | 108 | 126 | 120 |
Humidity/Visibility | 92 | 83 | 92 | 104 | 123 | 119 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 740 | 742 | 712 | 737 | 719 | 724 |
Tmin | 744 | 744 | 713 | 737 | 718 | 726 |
Duration of sunshine | 279 | 310 | 300 | 310 | 210 | 279 |
Precipitation | 126 | 127 | 120 | 122 | 120 | 124 |
Humidity/Visibility | 122 | 122 | 118 | 117 | 118 | 124 |
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. |