Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 834 | 749 | 833 | 806 | 831 | 803 |
| Tmin | 833 | 753 | 831 | 804 | 835 | 802 |
| słońce (godz.) | 394 | 354 | 329 | 343 | 424 | 372 |
| opad | 187 | 174 | 187 | 181 | 186 | 182 |
| wilgotność / widzialność | 179 | 162 | 180 | 174 | 179 | 173 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 832 | 827 | 831 | 844 | 823 | 859 |
| Tmin | 834 | 832 | 830 | 850 | 829 | 860 |
| słońce (godz.) | 333 | 484 | 437 | 469 | 375 | 417 |
| opad | 186 | 192 | 212 | 207 | 209 | 219 |
| wilgotność / widzialność | 180 | 177 | 199 | 195 | 195 | 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. |
