Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 514 | 477 | 534 | 514 | 560 | 536 |
Tmin | 515 | 469 | 523 | 510 | 553 | 544 |
Duration of sunshine | 188 | 164 | 187 | 167 | 209 | 218 |
Precipitation | 137 | 119 | 144 | 164 | 173 | 156 |
Humidity/Visibility | 101 | 90 | 104 | 109 | 128 | 126 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 543 | 555 | 517 | 549 | 514 | 547 |
Tmin | 547 | 561 | 530 | 551 | 509 | 550 |
Duration of sunshine | 249 | 219 | 186 | 306 | 181 | 243 |
Precipitation | 156 | 164 | 169 | 156 | 136 | 165 |
Humidity/Visibility | 119 | 124 | 121 | 121 | 96 | 122 |
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. |