Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 139 | 104 | 112 | 115 | 115 | 103 |
Tmin | 145 | 111 | 122 | 119 | 123 | 107 |
Duration of sunshine | 124 | 113 | 155 | 150 | 155 | 150 |
Precipitation | 153 | 139 | 157 | 152 | 156 | 135 |
Humidity/Visibility | 144 | 118 | 126 | 120 | 135 | 118 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 93 | 110 | 108 | 107 | 135 | 141 |
Tmin | 93 | 116 | 112 | 104 | 144 | 143 |
Duration of sunshine | 155 | 155 | 150 | 155 | 150 | 155 |
Precipitation | 125 | 153 | 149 | 152 | 180 | 183 |
Humidity/Visibility | 105 | 132 | 137 | 138 | 168 | 170 |
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. |