Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 680 | 615 | 682 | 672 | 689 | 659 |
Tmin | 802 | 723 | 803 | 774 | 805 | 778 |
Duration of sunshine | 173 | 149 | 173 | 163 | 170 | 171 |
Precipitation | 651 | 592 | 651 | 637 | 651 | 630 |
Humidity/Visibility | 121 | 123 | 136 | 137 | 139 | 121 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 681 | 682 | 682 | 694 | 657 | 680 |
Tmin | 804 | 803 | 803 | 824 | 803 | 833 |
Duration of sunshine | 167 | 168 | 189 | 190 | 188 | 202 |
Precipitation | 651 | 657 | 662 | 680 | 664 | 219 |
Humidity/Visibility | 136 | 130 | 157 | 155 | 152 | 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. |