Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 942 | 856 | 942 | 928 | 976 | 934 |
| Tmin | 1612 | 1456 | 1612 | 1560 | 1613 | 1561 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 85 | 78 | 88 | 93 | 97 | 104 |
| wilgotność / widzialność | 58 | 63 | 70 | 83 | 92 | 94 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 963 | 954 | 932 | 960 | 943 | 974 |
| Tmin | 1612 | 1612 | 1560 | 1612 | 1560 | 1612 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 118 | 127 | 126 | 117 | 120 | 128 |
| wilgotność / widzialność | 91 | 90 | 92 | 91 | 91 | 101 |
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. |
