Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 534 | 498 | 555 | 559 | 583 | 566 |
| Tmin | 536 | 505 | 552 | 563 | 583 | 564 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 124 | 112 | 126 | 146 | 163 | 153 |
| wilgotność / widzialność | 122 | 110 | 121 | 142 | 151 | 147 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 580 | 579 | 562 | 575 | 563 | 586 |
| Tmin | 584 | 586 | 566 | 577 | 565 | 587 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 161 | 156 | 153 | 152 | 153 | 157 |
| wilgotność / widzialność | 151 | 151 | 144 | 147 | 146 | 153 |
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. |
