Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 829 | 750 | 825 | 799 | 822 | 805 |
| Tmin | 806 | 722 | 800 | 778 | 803 | 777 |
| słońce (godz.) | 217 | 169 | 248 | 240 | 248 | 240 |
| opad | 186 | 169 | 186 | 180 | 186 | 179 |
| wilgotność / widzialność | 162 | 144 | 159 | 153 | 158 | 154 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 825 | 829 | 830 | 855 | 837 | 824 |
| Tmin | 797 | 804 | 802 | 832 | 803 | 831 |
| słońce (godz.) | 155 | 279 | 270 | 279 | 150 | 248 |
| opad | 187 | 192 | 213 | 213 | 214 | 194 |
| wilgotność / widzialność | 156 | 163 | 177 | 180 | 181 | 176 |
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. |
