Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 763 | 688 | 768 | 738 | 765 | 738 |
| Tmin | 763 | 689 | 765 | 737 | 764 | 739 |
| słońce (godz.) | 69 | 66 | 89 | 87 | 105 | 97 |
| opad | 715 | 646 | 715 | 691 | 716 | 690 |
| wilgotność / widzialność | 110 | 101 | 113 | 103 | 112 | 108 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 764 | 789 | 744 | 760 | 737 | 765 |
| Tmin | 769 | 785 | 742 | 756 | 743 | 762 |
| słońce (godz.) | 108 | 130 | 103 | 91 | 61 | 49 |
| opad | 715 | 748 | 721 | 738 | 694 | 714 |
| wilgotność / widzialność | 117 | 137 | 135 | 125 | 109 | 115 |
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. |
