Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 677 | 613 | 682 | 682 | 679 | 659 |
| Tmin | 678 | 616 | 680 | 680 | 679 | 659 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 683 | 616 | 682 | 686 | 712 | 690 |
| wilgotność / widzialność | 88 | 82 | 90 | 111 | 121 | 117 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 676 | 678 | 654 | 676 | 657 | 679 |
| Tmin | 679 | 682 | 658 | 676 | 656 | 680 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 714 | 714 | 691 | 709 | 694 | 724 |
| wilgotność / widzialność | 119 | 119 | 115 | 116 | 115 | 120 |
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. |
