Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 741 | 643 | 711 | 688 | 709 | 688 |
| Tmin | 742 | 647 | 711 | 688 | 713 | 689 |
| słońce (godz.) | 217 | 254 | 248 | 240 | 248 | 300 |
| opad | 186 | 169 | 189 | 181 | 186 | 180 |
| wilgotność / widzialność | 181 | 163 | 180 | 168 | 176 | 175 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 708 | 682 | 678 | 681 | 659 | 678 |
| Tmin | 712 | 686 | 678 | 681 | 659 | 679 |
| słońce (godz.) | 279 | 310 | 270 | 310 | 270 | 279 |
| opad | 186 | 190 | 212 | 215 | 212 | 219 |
| wilgotność / widzialność | 182 | 179 | 203 | 204 | 199 | 207 |
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. |
