Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 369 | 336 | 362 | 358 | 387 | 373 |
| Tmin | 311 | 280 | 310 | 309 | 315 | 304 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 63 | 57 | 62 | 84 | 96 | 90 |
| wilgotność / widzialność | 59 | 55 | 54 | 62 | 79 | 77 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 389 | 395 | 376 | 394 | 374 | 395 |
| Tmin | 319 | 314 | 303 | 311 | 300 | 312 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 98 | 100 | 95 | 91 | 91 | 97 |
| wilgotność / widzialność | 81 | 75 | 69 | 80 | 79 | 87 |
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. |
