Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 92 | 81 | 102 | 108 | 119 | 111 |
Tmin | 88 | 75 | 87 | 101 | 115 | 111 |
Duration of sunshine | 154 | 161 | 150 | 125 | 131 | 169 |
Precipitation | 149 | 127 | 154 | 176 | 179 | 174 |
Humidity/Visibility | 94 | 86 | 99 | 105 | 122 | 119 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 106 | 102 | 102 | 114 | 90 | 112 |
Tmin | 110 | 100 | 102 | 107 | 80 | 89 |
Duration of sunshine | 198 | 192 | 132 | 232 | 87 | 163 |
Precipitation | 181 | 185 | 197 | 176 | 165 | 217 |
Humidity/Visibility | 112 | 110 | 109 | 116 | 88 | 108 |
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. |