Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 485 | 457 | 508 | 514 | 545 | 533 |
| Tmin | 482 | 460 | 511 | 514 | 541 | 532 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 95 | 87 | 95 | 110 | 124 | 120 |
| wilgotność / widzialność | 92 | 83 | 91 | 104 | 123 | 118 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 556 | 555 | 538 | 551 | 537 | 552 |
| Tmin | 556 | 557 | 538 | 551 | 536 | 552 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 127 | 129 | 120 | 124 | 120 | 124 |
| wilgotność / widzialność | 122 | 121 | 118 | 117 | 117 | 123 |
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. |
