Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 114 | 107 | 122 | 140 | 145 | 132 |
Tmin | 117 | 106 | 118 | 140 | 147 | 131 |
Duration of sunshine | 248 | 198 | 248 | 210 | 186 | 180 |
Precipitation | 126 | 116 | 138 | 154 | 165 | 160 |
Humidity/Visibility | 119 | 110 | 120 | 143 | 147 | 134 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 148 | 151 | 142 | 144 | 140 | 149 |
Tmin | 145 | 148 | 140 | 138 | 141 | 143 |
Duration of sunshine | 248 | 186 | 240 | 279 | 240 | 217 |
Precipitation | 161 | 161 | 159 | 165 | 158 | 165 |
Humidity/Visibility | 148 | 150 | 141 | 143 | 140 | 144 |
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. |