Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 701 | 633 | 706 | 670 | 676 | 656 |
| Tmin | 703 | 636 | 705 | 667 | 678 | 658 |
| słońce (godz.) | 55 | 63 | 92 | 77 | 87 | 85 |
| opad | 682 | 616 | 682 | 660 | 685 | 660 |
| wilgotność / widzialność | 112 | 101 | 115 | 104 | 112 | 108 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 682 | 707 | 684 | 699 | 677 | 704 |
| Tmin | 684 | 707 | 681 | 697 | 683 | 704 |
| słońce (godz.) | 93 | 116 | 99 | 90 | 52 | 43 |
| opad | 682 | 715 | 692 | 705 | 661 | 684 |
| wilgotność / widzialność | 117 | 139 | 136 | 128 | 109 | 117 |
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. |
