Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 645 | 586 | 646 | 627 | 650 | 626 |
| Tmin | 648 | 589 | 648 | 629 | 650 | 629 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 125 | 114 | 124 | 122 | 128 | 121 |
| wilgotność / widzialność | 119 | 106 | 118 | 111 | 118 | 116 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 648 | 649 | 627 | 646 | 625 | 650 |
| Tmin | 646 | 647 | 628 | 644 | 626 | 648 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 128 | 125 | 120 | 124 | 123 | 131 |
| wilgotność / widzialność | 119 | 118 | 114 | 113 | 113 | 121 |
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. |
