Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 600 | 561 | 618 | 598 | 608 | 598 |
Tmin | 602 | 560 | 618 | 597 | 609 | 599 |
Duration of sunshine | 124 | 113 | 155 | 150 | 155 | 150 |
Precipitation | 188 | 168 | 187 | 182 | 189 | 172 |
Humidity/Visibility | 182 | 167 | 183 | 178 | 183 | 177 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 614 | 617 | 614 | 642 | 626 | 650 |
Tmin | 618 | 622 | 615 | 640 | 626 | 649 |
Duration of sunshine | 155 | 155 | 150 | 155 | 150 | 155 |
Precipitation | 163 | 180 | 207 | 205 | 203 | 198 |
Humidity/Visibility | 182 | 184 | 203 | 208 | 205 | 214 |
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. |