Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 700 | 632 | 706 | 678 | 702 | 678 |
| Tmin | 701 | 635 | 703 | 675 | 703 | 680 |
| słońce (godz.) | 62 | 78 | 93 | 88 | 109 | 99 |
| opad | 684 | 616 | 682 | 661 | 688 | 660 |
| wilgotność / widzialność | 109 | 100 | 112 | 103 | 112 | 107 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 703 | 732 | 697 | 698 | 678 | 703 |
| Tmin | 708 | 729 | 694 | 695 | 684 | 702 |
| słońce (godz.) | 111 | 133 | 112 | 91 | 55 | 46 |
| opad | 682 | 715 | 692 | 705 | 660 | 684 |
| wilgotność / widzialność | 116 | 137 | 134 | 126 | 110 | 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. |
