Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 520 | 472 | 522 | 494 | 515 | 508 |
| Tmin | 499 | 449 | 512 | 489 | 509 | 493 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 83 | 75 | 80 | 75 | 81 | 84 |
| wilgotność / widzialność | 24 | 22 | 24 | 18 | 21 | 28 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 525 | 524 | 510 | 526 | 507 | 511 |
| Tmin | 520 | 512 | 505 | 518 | 503 | 505 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 103 | 93 | 95 | 112 | 117 | 127 |
| wilgotność / widzialność | 32 | 24 | 27 | 30 | 31 | 19 |
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. |
