Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 768 | 693 | 766 | 738 | 764 | 744 |
| Tmin | 763 | 691 | 762 | 732 | 762 | 742 |
| słońce (godz.) | 77 | 85 | 100 | 97 | 119 | 104 |
| opad | 181 | 154 | 165 | 165 | 173 | 156 |
| wilgotność / widzialność | 115 | 107 | 117 | 111 | 115 | 116 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 754 | 744 | 730 | 758 | 734 | 752 |
| Tmin | 736 | 738 | 719 | 748 | 716 | 736 |
| słońce (godz.) | 86 | 87 | 80 | 63 | 36 | 53 |
| opad | 186 | 179 | 194 | 179 | 192 | 200 |
| wilgotność / widzialność | 111 | 103 | 107 | 114 | 110 | 108 |
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. |
