Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 726 | 644 | 727 | 725 | 755 | 725 |
Tmin | 728 | 652 | 729 | 722 | 754 | 728 |
Duration of sunshine | 107 | 92 | 107 | 122 | 132 | 127 |
Precipitation | 132 | 118 | 124 | 145 | 162 | 156 |
Humidity/Visibility | 67 | 54 | 66 | 77 | 84 | 83 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 742 | 747 | 723 | 741 | 674 | 703 |
Tmin | 743 | 743 | 734 | 735 | 668 | 704 |
Duration of sunshine | 122 | 125 | 132 | 110 | 67 | 84 |
Precipitation | 154 | 161 | 167 | 162 | 124 | 140 |
Humidity/Visibility | 85 | 81 | 82 | 94 | 51 | 65 |
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. |