Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 746 | 683 | 760 | 731 | 740 | 733 |
Tmin | 755 | 686 | 757 | 730 | 742 | 722 |
Duration of sunshine | 129 | 116 | 140 | 138 | 139 | 137 |
Precipitation | 190 | 178 | 192 | 184 | 171 | 177 |
Humidity/Visibility | 171 | 158 | 167 | 162 | 154 | 161 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 755 | 754 | 751 | 772 | 746 | 775 |
Tmin | 755 | 757 | 738 | 780 | 758 | 772 |
Duration of sunshine | 152 | 161 | 146 | 168 | 161 | 146 |
Precipitation | 185 | 190 | 210 | 222 | 218 | 224 |
Humidity/Visibility | 172 | 173 | 181 | 187 | 185 | 193 |
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. |