Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 599 | 555 | 616 | 587 | 611 | 597 |
| Tmin | 602 | 560 | 614 | 593 | 618 | 598 |
| słońce (godz.) | 236 | 239 | 265 | 256 | 258 | 263 |
| opad | 192 | 179 | 196 | 186 | 194 | 182 |
| wilgotność / widzialność | 167 | 155 | 174 | 170 | 177 | 172 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 608 | 609 | 619 | 634 | 613 | 633 |
| Tmin | 609 | 614 | 621 | 642 | 619 | 641 |
| słońce (godz.) | 259 | 259 | 289 | 257 | 286 | 293 |
| opad | 204 | 204 | 216 | 217 | 219 | 233 |
| wilgotność / widzialność | 171 | 176 | 199 | 203 | 191 | 197 |
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. |
