Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 773 | 698 | 775 | 771 | 805 | 779 |
| Tmin | 771 | 696 | 771 | 773 | 803 | 778 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 129 | 114 | 124 | 146 | 155 | 151 |
| wilgotność / widzialność | 121 | 111 | 123 | 143 | 154 | 148 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 804 | 802 | 779 | 794 | 777 | 805 |
| Tmin | 803 | 805 | 778 | 798 | 777 | 804 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 156 | 156 | 151 | 152 | 151 | 157 |
| wilgotność / widzialność | 153 | 151 | 148 | 148 | 148 | 154 |
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. |
