Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 84 | 75 | 82 | 112 | 116 | 114 |
| Tmin | 87 | 76 | 86 | 113 | 119 | 115 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 100 | 97 | 97 | 135 | 130 | 126 |
| wilgotność / widzialność | 65 | 58 | 63 | 83 | 86 | 84 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 110 | 117 | 106 | 112 | 103 | 109 |
| Tmin | 115 | 117 | 117 | 119 | 104 | 116 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 131 | 130 | 120 | 123 | 129 | 143 |
| wilgotność / widzialność | 84 | 86 | 82 | 84 | 78 | 83 |
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. |
