Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 739 | 668 | 742 | 730 | 770 | 748 |
| Tmin | 734 | 660 | 733 | 721 | 764 | 737 |
| słońce (godz.) | 305 | 307 | 308 | 337 | 369 | 346 |
| opad | 95 | 87 | 94 | 107 | 124 | 120 |
| wilgotność / widzialność | 92 | 84 | 92 | 104 | 123 | 119 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 775 | 774 | 748 | 768 | 742 | 771 |
| Tmin | 762 | 767 | 744 | 759 | 740 | 762 |
| słońce (godz.) | 384 | 380 | 344 | 383 | 319 | 337 |
| opad | 127 | 127 | 120 | 121 | 120 | 124 |
| wilgotność / widzialność | 123 | 122 | 118 | 118 | 119 | 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. |
