Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 477 | 432 | 487 | 474 | 490 | 461 |
Tmin | 107 | 102 | 113 | 114 | 119 | 114 |
Duration of sunshine | 97 | 92 | 99 | 97 | 105 | 101 |
Precipitation | 124 | 112 | 124 | 121 | 124 | 120 |
Humidity/Visibility | 113 | 103 | 116 | 112 | 115 | 116 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 482 | 506 | 496 | 509 | 495 | 480 |
Tmin | 111 | 130 | 132 | 131 | 127 | 111 |
Duration of sunshine | 106 | 122 | 123 | 111 | 73 | 105 |
Precipitation | 129 | 154 | 154 | 152 | 149 | 128 |
Humidity/Visibility | 117 | 128 | 135 | 132 | 120 | 115 |
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. |