Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 741 | 668 | 742 | 717 | 741 | 720 |
| Tmin | 740 | 671 | 743 | 718 | 744 | 719 |
| słońce (godz.) | 153 | 139 | 153 | 148 | 148 | 148 |
| opad | 744 | 672 | 742 | 721 | 744 | 720 |
| wilgotność / widzialność | 152 | 138 | 154 | 148 | 152 | 148 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 737 | 741 | 720 | 736 | 718 | 744 |
| Tmin | 738 | 742 | 720 | 737 | 718 | 741 |
| słońce (godz.) | 143 | 153 | 146 | 149 | 147 | 152 |
| opad | 742 | 746 | 720 | 742 | 720 | 744 |
| wilgotność / widzialność | 150 | 152 | 149 | 148 | 148 | 153 |
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. |
