Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 613 | 561 | 619 | 613 | 650 | 625 |
| Tmin | 616 | 560 | 619 | 614 | 646 | 627 |
| słońce (godz.) | 59 | 56 | 61 | 74 | 88 | 87 |
| opad | 558 | 505 | 558 | 556 | 589 | 569 |
| wilgotność / widzialność | 60 | 56 | 61 | 74 | 91 | 88 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 649 | 647 | 629 | 644 | 625 | 648 |
| Tmin | 640 | 644 | 627 | 643 | 627 | 650 |
| słońce (godz.) | 84 | 88 | 86 | 84 | 87 | 91 |
| opad | 595 | 590 | 570 | 586 | 570 | 589 |
| wilgotność / widzialność | 91 | 91 | 88 | 87 | 88 | 92 |
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. |
