Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 371 | 336 | 371 | 373 | 403 | 388 |
| Tmin | 372 | 337 | 369 | 373 | 403 | 388 |
| słońce (godz.) | 61 | 57 | 59 | 72 | 90 | 87 |
| opad | 62 | 57 | 62 | 84 | 93 | 90 |
| wilgotność / widzialność | 61 | 56 | 61 | 73 | 91 | 88 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 403 | 402 | 389 | 399 | 387 | 400 |
| Tmin | 399 | 399 | 388 | 397 | 389 | 402 |
| słońce (godz.) | 85 | 89 | 87 | 82 | 88 | 92 |
| opad | 97 | 95 | 90 | 92 | 92 | 92 |
| wilgotność / widzialność | 90 | 91 | 88 | 85 | 88 | 92 |
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. |
