Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 476 | 438 | 479 | 490 | 506 | 475 |
Tmin | 483 | 440 | 478 | 488 | 512 | 494 |
Duration of sunshine | 276 | 246 | 239 | 317 | 307 | 244 |
Precipitation | 469 | 424 | 475 | 489 | 500 | 493 |
Humidity/Visibility | 105 | 99 | 105 | 116 | 131 | 120 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 486 | 493 | 468 | 505 | 487 | 509 |
Tmin | 511 | 510 | 494 | 501 | 486 | 502 |
Duration of sunshine | 290 | 228 | 278 | 381 | 284 | 351 |
Precipitation | 511 | 516 | 494 | 526 | 494 | 508 |
Humidity/Visibility | 121 | 123 | 119 | 125 | 121 | 127 |
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. |