Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 87 | 62 | 79 | 74 | 87 | 72 |
| Tmin | 100 | 78 | 84 | 76 | 90 | 83 |
| słońce (godz.) | 103 | 79 | 90 | 85 | 91 | 83 |
| opad | 159 | 144 | 177 | 175 | 165 | 149 |
| wilgotność / widzialność | 139 | 124 | 134 | 117 | 119 | 129 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 80 | 106 | 86 | 84 | 80 | 80 |
| Tmin | 84 | 105 | 87 | 83 | 78 | 84 |
| słońce (godz.) | 81 | 106 | 88 | 83 | 80 | 85 |
| opad | 161 | 192 | 199 | 184 | 168 | 170 |
| wilgotność / widzialność | 107 | 131 | 158 | 154 | 128 | 142 |
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. |
