Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 835 | 756 | 835 | 810 | 835 | 810 |
Tmin | 837 | 757 | 836 | 809 | 836 | 808 |
Duration of sunshine | 432 | 417 | 416 | 441 | 489 | 440 |
Precipitation | 186 | 169 | 187 | 181 | 186 | 180 |
Humidity/Visibility | 184 | 167 | 184 | 178 | 184 | 179 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 831 | 837 | 837 | 864 | 838 | 866 |
Tmin | 837 | 839 | 838 | 864 | 837 | 867 |
Duration of sunshine | 432 | 459 | 438 | 479 | 436 | 425 |
Precipitation | 186 | 190 | 210 | 215 | 210 | 217 |
Humidity/Visibility | 183 | 184 | 207 | 210 | 206 | 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. |