Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 85 | 56 | 71 | 87 | 91 | 87 |
| Tmin | 86 | 63 | 68 | 82 | 91 | 87 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 124 | 107 | 123 | 140 | 154 | 150 |
| wilgotność / widzialność | 84 | 69 | 90 | 123 | 142 | 137 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 93 | 80 | 89 | 60 | 82 | 73 |
| Tmin | 91 | 84 | 89 | 64 | 80 | 77 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 148 | 153 | 147 | 139 | 124 | 127 |
| wilgotność / widzialność | 142 | 134 | 137 | 105 | 111 | 106 |
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. |
