Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 631 | 571 | 640 | 622 | 646 | 621 |
| Tmin | 634 | 572 | 638 | 627 | 645 | 622 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 159 | 142 | 156 | 151 | 159 | 152 |
| wilgotność / widzialność | 128 | 119 | 138 | 135 | 139 | 142 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 642 | 656 | 641 | 657 | 642 | 618 |
| Tmin | 639 | 655 | 636 | 660 | 647 | 623 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 165 | 184 | 182 | 181 | 180 | 163 |
| wilgotność / widzialność | 138 | 141 | 154 | 161 | 145 | 142 |
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. |
