Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 770 | 704 | 775 | 749 | 773 | 749 |
| Tmin | 775 | 703 | 774 | 749 | 775 | 748 |
| słońce (godz.) | 837 | 786 | 867 | 838 | 867 | 838 |
| opad | 188 | 168 | 186 | 181 | 186 | 180 |
| wilgotność / widzialność | 184 | 167 | 185 | 179 | 184 | 178 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 774 | 771 | 746 | 766 | 743 | 776 |
| Tmin | 774 | 775 | 749 | 767 | 747 | 775 |
| słońce (godz.) | 867 | 871 | 929 | 953 | 897 | 930 |
| opad | 188 | 190 | 210 | 215 | 210 | 217 |
| wilgotność / widzialność | 184 | 184 | 207 | 210 | 205 | 215 |
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. |
