Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 121 | 107 | 121 | 134 | 146 | 129 |
| Tmin | 115 | 108 | 116 | 134 | 146 | 125 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 134 | 117 | 140 | 153 | 165 | 156 |
| wilgotność / widzialność | 87 | 81 | 87 | 100 | 109 | 107 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 116 | 119 | 116 | 111 | 115 | 113 |
| Tmin | 119 | 112 | 115 | 108 | 109 | 118 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 161 | 167 | 156 | 159 | 159 | 164 |
| wilgotność / widzialność | 111 | 108 | 107 | 105 | 106 | 108 |
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. |
