Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 492 | 447 | 491 | 510 | 523 | 510 |
Tmin | 493 | 444 | 496 | 510 | 525 | 509 |
Duration of sunshine | 186 | 197 | 248 | 210 | 217 | 270 |
Precipitation | 469 | 426 | 467 | 483 | 496 | 480 |
Humidity/Visibility | 91 | 82 | 91 | 117 | 122 | 118 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 521 | 521 | 505 | 520 | 507 | 523 |
Tmin | 524 | 524 | 506 | 522 | 505 | 524 |
Duration of sunshine | 217 | 155 | 240 | 186 | 180 | 217 |
Precipitation | 498 | 498 | 480 | 495 | 482 | 498 |
Humidity/Visibility | 123 | 120 | 118 | 116 | 117 | 123 |
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. |