Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 713 | 644 | 713 | 705 | 744 | 720 |
| Tmin | 712 | 644 | 711 | 705 | 743 | 720 |
| słońce (godz.) | 155 | 170 | 186 | 150 | 186 | 210 |
| opad | 93 | 85 | 95 | 107 | 124 | 120 |
| wilgotność / widzialność | 92 | 84 | 92 | 104 | 123 | 119 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 744 | 743 | 720 | 740 | 718 | 744 |
| Tmin | 740 | 742 | 719 | 739 | 719 | 743 |
| słońce (godz.) | 217 | 186 | 180 | 186 | 150 | 186 |
| opad | 126 | 126 | 122 | 121 | 120 | 124 |
| wilgotność / widzialność | 122 | 122 | 118 | 118 | 118 | 124 |
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. |
