Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 92 | 80 | 91 | 87 | 88 | 102 |
Tmin | 87 | 82 | 89 | 82 | 91 | 99 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 97 | 87 | 96 | 92 | 96 | 105 |
Humidity/Visibility | 91 | 83 | 90 | 88 | 91 | 101 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 121 | 118 | 113 | 116 | 116 | 124 |
Tmin | 119 | 117 | 111 | 113 | 114 | 118 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 127 | 129 | 121 | 124 | 128 | 126 |
Humidity/Visibility | 120 | 118 | 116 | 115 | 114 | 122 |
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. |