Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 319 | 288 | 308 | 314 | 328 | 320 |
| Tmin | 321 | 281 | 303 | 313 | 338 | 317 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 94 | 87 | 95 | 111 | 124 | 122 |
| wilgotność / widzialność | 92 | 84 | 91 | 103 | 122 | 116 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 328 | 323 | 329 | 354 | 353 | 350 |
| Tmin | 338 | 328 | 331 | 352 | 354 | 356 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 127 | 129 | 122 | 124 | 120 | 124 |
| wilgotność / widzialność | 122 | 121 | 117 | 116 | 118 | 124 |
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. |
