Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 651 | 587 | 650 | 627 | 650 | 641 |
| Tmin | 649 | 588 | 644 | 623 | 648 | 640 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 64 | 59 | 62 | 62 | 62 | 73 |
| wilgotność / widzialność | 61 | 56 | 61 | 57 | 62 | 72 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 681 | 680 | 655 | 674 | 657 | 682 |
| Tmin | 677 | 679 | 657 | 674 | 656 | 679 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 96 | 98 | 91 | 91 | 96 | 99 |
| wilgotność / widzialność | 91 | 91 | 87 | 86 | 86 | 91 |
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. |
