Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 706 | 638 | 706 | 712 | 704 | 682 |
| Tmin | 711 | 642 | 709 | 719 | 711 | 687 |
| słońce (godz.) | 217 | 225 | 248 | 240 | 217 | 270 |
| opad | 99 | 87 | 98 | 123 | 127 | 123 |
| wilgotność / widzialność | 90 | 82 | 90 | 116 | 119 | 117 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 709 | 710 | 685 | 701 | 685 | 704 |
| Tmin | 709 | 709 | 682 | 707 | 686 | 705 |
| słońce (godz.) | 217 | 248 | 270 | 310 | 180 | 248 |
| opad | 128 | 130 | 131 | 129 | 126 | 138 |
| wilgotność / widzialność | 122 | 120 | 116 | 113 | 115 | 119 |
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. |
