Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 94 | 69 | 84 | 81 | 88 | 70 |
| Tmin | 102 | 77 | 90 | 85 | 89 | 79 |
| słońce (godz.) | 103 | 79 | 89 | 85 | 90 | 82 |
| opad | 157 | 142 | 174 | 171 | 163 | 149 |
| wilgotność / widzialność | 139 | 125 | 134 | 118 | 120 | 129 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 85 | 105 | 88 | 77 | 78 | 84 |
| Tmin | 82 | 98 | 85 | 75 | 82 | 85 |
| słońce (godz.) | 86 | 105 | 87 | 83 | 82 | 87 |
| opad | 157 | 192 | 199 | 186 | 160 | 163 |
| wilgotność / widzialność | 110 | 131 | 158 | 156 | 129 | 143 |
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. |
