Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 102 | 106 | 117 | 132 | 135 | 116 |
| Tmin | 109 | 95 | 111 | 134 | 132 | 103 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 154 | 144 | 144 | 170 | 209 | 198 |
| wilgotność / widzialność | 103 | 100 | 114 | 130 | 126 | 109 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 124 | 137 | 119 | 119 | 138 | 137 |
| Tmin | 116 | 130 | 119 | 124 | 134 | 137 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 203 | 211 | 169 | 163 | 166 | 185 |
| wilgotność / widzialność | 120 | 130 | 121 | 124 | 138 | 138 |
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. |
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