Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 732 | 660 | 736 | 700 | 708 | 686 |
| Tmin | 734 | 665 | 735 | 698 | 709 | 689 |
| słońce (godz.) | 78 | 70 | 99 | 82 | 87 | 79 |
| opad | 713 | 644 | 713 | 691 | 716 | 690 |
| wilgotność / widzialność | 112 | 102 | 115 | 105 | 111 | 109 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 713 | 738 | 713 | 728 | 705 | 735 |
| Tmin | 714 | 738 | 712 | 729 | 714 | 735 |
| słońce (godz.) | 90 | 116 | 95 | 93 | 71 | 62 |
| opad | 715 | 746 | 721 | 737 | 691 | 715 |
| wilgotność / widzialność | 117 | 139 | 135 | 129 | 109 | 116 |
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. |
