Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 617 | 560 | 620 | 614 | 623 | 600 |
| Tmin | 617 | 561 | 618 | 613 | 626 | 600 |
| słońce (godz.) | 182 | 310 | 307 | 282 | 344 | 270 |
| opad | 63 | 60 | 63 | 76 | 93 | 90 |
| wilgotność / widzialność | 60 | 55 | 60 | 74 | 92 | 88 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 620 | 618 | 599 | 616 | 597 | 620 |
| Tmin | 615 | 616 | 597 | 615 | 598 | 619 |
| słońce (godz.) | 243 | 306 | 356 | 366 | 296 | 124 |
| opad | 96 | 94 | 90 | 90 | 91 | 93 |
| wilgotność / widzialność | 92 | 90 | 88 | 86 | 88 | 93 |
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. |
