Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 643 | 581 | 648 | 623 | 639 | 623 |
Tmin | 648 | 583 | 643 | 623 | 646 | 621 |
Duration of sunshine | 180 | 160 | 178 | 170 | 181 | 174 |
Precipitation | 186 | 170 | 186 | 181 | 185 | 180 |
Humidity/Visibility | 182 | 166 | 182 | 177 | 180 | 176 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 643 | 648 | 651 | 671 | 649 | 677 |
Tmin | 647 | 649 | 653 | 673 | 652 | 677 |
Duration of sunshine | 179 | 183 | 203 | 204 | 202 | 213 |
Precipitation | 186 | 190 | 214 | 214 | 210 | 219 |
Humidity/Visibility | 183 | 184 | 204 | 208 | 204 | 215 |
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. |