Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 485 | 449 | 507 | 488 | 490 | 510 |
| Tmin | 487 | 451 | 507 | 490 | 485 | 506 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 95 | 86 | 97 | 97 | 98 | 107 |
| wilgotność / widzialność | 90 | 83 | 88 | 86 | 91 | 97 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 549 | 547 | 530 | 523 | 520 | 535 |
| Tmin | 547 | 550 | 534 | 521 | 519 | 531 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 131 | 129 | 121 | 121 | 120 | 129 |
| wilgotność / widzialność | 120 | 119 | 116 | 115 | 117 | 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. |
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