Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 83 | 79 | 79 | 87 | 87 | 99 |
| Tmin | 91 | 77 | 84 | 84 | 90 | 100 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 98 | 93 | 100 | 101 | 98 | 106 |
| wilgotność / widzialność | 65 | 60 | 64 | 64 | 66 | 73 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 112 | 119 | 115 | 114 | 106 | 112 |
| Tmin | 117 | 121 | 116 | 115 | 105 | 119 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 130 | 130 | 123 | 126 | 129 | 131 |
| wilgotność / widzialność | 86 | 88 | 86 | 84 | 81 | 87 |
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. |
