Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 567 | 546 | 607 | 581 | 581 | 581 |
| Tmin | 565 | 544 | 601 | 578 | 589 | 590 |
| słońce (godz.) | 155 | 226 | 279 | 270 | 310 | 300 |
| opad | 198 | 177 | 210 | 202 | 193 | 188 |
| wilgotność / widzialność | 171 | 157 | 170 | 164 | 171 | 172 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 597 | 594 | 601 | 617 | 579 | 596 |
| Tmin | 596 | 591 | 604 | 622 | 572 | 600 |
| słońce (godz.) | 217 | 310 | 240 | 310 | 270 | 248 |
| opad | 190 | 200 | 217 | 215 | 188 | 200 |
| wilgotność / widzialność | 169 | 164 | 186 | 192 | 161 | 175 |
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. |
