Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 587 | 532 | 590 | 584 | 620 | 598 |
Tmin | 589 | 533 | 587 | 583 | 620 | 600 |
Duration of sunshine | 248 | 254 | 279 | 240 | 310 | 270 |
Precipitation | 31 | 28 | 34 | 31 | 31 | 30 |
Humidity/Visibility | 30 | 28 | 31 | 44 | 61 | 59 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 618 | 619 | 598 | 607 | 569 | 589 |
Tmin | 618 | 619 | 596 | 610 | 568 | 589 |
Duration of sunshine | 279 | 310 | 300 | 279 | 210 | 217 |
Precipitation | 32 | 37 | 31 | 38 | 63 | 62 |
Humidity/Visibility | 62 | 62 | 58 | 50 | 29 | 31 |
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. |