Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 803 | 752 | 832 | 822 | 850 | 837 |
| Tmin | 803 | 754 | 833 | 824 | 853 | 837 |
| słońce (godz.) | 89 | 81 | 88 | 100 | 113 | 113 |
| opad | 343 | 310 | 341 | 349 | 374 | 361 |
| wilgotność / widzialność | 91 | 83 | 91 | 103 | 122 | 118 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 865 | 865 | 822 | 858 | 837 | 866 |
| Tmin | 866 | 866 | 824 | 860 | 837 | 868 |
| słońce (godz.) | 121 | 120 | 117 | 114 | 109 | 116 |
| opad | 373 | 373 | 360 | 370 | 360 | 373 |
| wilgotność / widzialność | 122 | 121 | 118 | 117 | 117 | 123 |
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. |
