Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 472 | 451 | 498 | 479 | 499 | 488 |
Tmin | 470 | 450 | 500 | 483 | 499 | 483 |
Duration of sunshine | 248 | 254 | 279 | 240 | 310 | 270 |
Precipitation | 93 | 85 | 94 | 108 | 124 | 120 |
Humidity/Visibility | 92 | 84 | 92 | 104 | 123 | 119 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 499 | 499 | 480 | 526 | 512 | 529 |
Tmin | 504 | 503 | 478 | 530 | 519 | 532 |
Duration of sunshine | 279 | 279 | 300 | 279 | 180 | 279 |
Precipitation | 127 | 127 | 120 | 124 | 120 | 124 |
Humidity/Visibility | 123 | 121 | 118 | 117 | 118 | 124 |
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. |