Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 79 | 61 | 78 | 96 | 108 | 94 |
Tmin | 80 | 65 | 81 | 103 | 109 | 98 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 103 | 88 | 97 | 120 | 124 | 121 |
Humidity/Visibility | 84 | 73 | 84 | 95 | 111 | 107 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 104 | 106 | 106 | 96 | 70 | 84 |
Tmin | 101 | 102 | 111 | 90 | 69 | 86 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 122 | 127 | 123 | 119 | 91 | 106 |
Humidity/Visibility | 106 | 101 | 109 | 99 | 81 | 88 |
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. |