Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 179 | 134 | 133 | 118 | 124 | 113 |
Tmin | 183 | 139 | 133 | 114 | 119 | 117 |
Duration of sunshine | 184 | 139 | 132 | 114 | 116 | 117 |
Precipitation | 191 | 172 | 190 | 186 | 188 | 182 |
Humidity/Visibility | 135 | 122 | 133 | 130 | 135 | 129 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 112 | 96 | 109 | 68 | 60 | 63 |
Tmin | 119 | 95 | 105 | 64 | 58 | 61 |
Duration of sunshine | 116 | 94 | 103 | 63 | 57 | 56 |
Precipitation | 183 | 192 | 214 | 214 | 212 | 217 |
Humidity/Visibility | 131 | 137 | 152 | 153 | 151 | 154 |
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. |