Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 117 | 111 | 119 | 130 | 149 | 123 |
Tmin | 117 | 106 | 122 | 133 | 143 | 122 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 136 | 120 | 126 | 149 | 169 | 170 |
Humidity/Visibility | 88 | 82 | 92 | 100 | 110 | 93 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 143 | 146 | 143 | 138 | 133 | 133 |
Tmin | 144 | 150 | 142 | 136 | 123 | 128 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 163 | 173 | 165 | 171 | 178 | 188 |
Humidity/Visibility | 110 | 110 | 107 | 104 | 97 | 98 |
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. |