Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 333 | 304 | 334 | 338 | 364 | 353 |
| Tmin | 334 | 304 | 337 | 337 | 364 | 356 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 99 | 92 | 98 | 118 | 133 | 122 |
| wilgotność / widzialność | 87 | 81 | 90 | 99 | 116 | 115 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 365 | 363 | 349 | 359 | 344 | 363 |
| Tmin | 363 | 361 | 350 | 360 | 351 | 368 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 135 | 133 | 129 | 126 | 128 | 128 |
| wilgotność / widzialność | 118 | 117 | 112 | 112 | 110 | 120 |
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. |
