Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 1612 | 1467 | 1612 | 1560 | 1612 | 1560 |
| Tmin | 1612 | 1467 | 1612 | 1560 | 1612 | 1560 |
| słońce (godz.) | 1425 | 1296 | 1421 | 1378 | 1425 | 1376 |
| opad | 188 | 168 | 186 | 181 | 186 | 180 |
| wilgotność / widzialność | 185 | 167 | 185 | 179 | 185 | 178 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 1612 | 1612 | 1560 | 1612 | 1560 | 1612 |
| Tmin | 1612 | 1612 | 1560 | 1612 | 1560 | 1612 |
| słońce (godz.) | 1394 | 1428 | 1469 | 1511 | 1438 | 1487 |
| opad | 188 | 190 | 210 | 215 | 210 | 217 |
| wilgotność / widzialność | 184 | 184 | 206 | 210 | 207 | 214 |
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. |
