Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 91 | 67 | 80 | 84 | 87 | 69 |
| Tmin | 97 | 75 | 87 | 81 | 90 | 84 |
| słońce (godz.) | 97 | 75 | 87 | 80 | 90 | 84 |
| opad | 158 | 140 | 154 | 154 | 157 | 152 |
| wilgotność / widzialność | 138 | 125 | 137 | 131 | 137 | 135 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 74 | 80 | 88 | 83 | 89 | 92 |
| Tmin | 81 | 80 | 87 | 86 | 88 | 92 |
| słońce (godz.) | 80 | 81 | 87 | 86 | 88 | 92 |
| opad | 166 | 189 | 182 | 150 | 148 | 159 |
| wilgotność / widzialność | 138 | 153 | 161 | 123 | 132 | 144 |
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. |
