Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 740 | 665 | 741 | 718 | 739 | 717 |
| Tmin | 737 | 670 | 740 | 717 | 743 | 719 |
| słońce (godz.) | 370 | 334 | 400 | 419 | 337 | 357 |
| opad | 157 | 142 | 157 | 151 | 155 | 152 |
| wilgotność / widzialność | 150 | 136 | 152 | 148 | 151 | 148 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 734 | 731 | 718 | 728 | 688 | 713 |
| Tmin | 733 | 731 | 718 | 725 | 687 | 711 |
| słońce (godz.) | 388 | 420 | 384 | 384 | 357 | 370 |
| opad | 155 | 159 | 154 | 154 | 124 | 124 |
| wilgotność / widzialność | 146 | 141 | 147 | 138 | 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. |
