Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 845 | 785 | 867 | 859 | 893 | 867 |
| Tmin | 846 | 784 | 862 | 861 | 894 | 864 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 124 | 112 | 124 | 146 | 155 | 151 |
| wilgotność / widzialność | 123 | 111 | 122 | 141 | 153 | 148 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 890 | 894 | 862 | 883 | 866 | 896 |
| Tmin | 895 | 895 | 861 | 885 | 868 | 895 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 157 | 156 | 153 | 149 | 152 | 157 |
| wilgotność / widzialność | 152 | 152 | 147 | 144 | 147 | 153 |
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. |
