Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 134 | 123 | 148 | 143 | 150 | 128 |
Tmin | 136 | 128 | 140 | 143 | 150 | 136 |
Duration of sunshine | 126 | 117 | 129 | 124 | 135 | 130 |
Precipitation | 159 | 140 | 155 | 151 | 156 | 154 |
Humidity/Visibility | 143 | 131 | 145 | 139 | 140 | 140 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 142 | 164 | 164 | 168 | 165 | 140 |
Tmin | 143 | 158 | 163 | 152 | 154 | 145 |
Duration of sunshine | 135 | 150 | 153 | 139 | 93 | 131 |
Precipitation | 164 | 186 | 188 | 185 | 187 | 163 |
Humidity/Visibility | 138 | 151 | 160 | 161 | 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. |