Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 122 | 107 | 126 | 115 | 112 | 99 |
Tmin | 124 | 115 | 131 | 117 | 113 | 109 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 149 | 136 | 153 | 146 | 153 | 150 |
Humidity/Visibility | 130 | 121 | 129 | 115 | 124 | 128 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 102 | 132 | 132 | 130 | 137 | 139 |
Tmin | 98 | 122 | 129 | 127 | 136 | 128 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 143 | 184 | 183 | 168 | 149 | 156 |
Humidity/Visibility | 111 | 134 | 153 | 143 | 119 | 137 |
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. |