Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 1953 | 1775 | 1953 | 1890 | 1953 | 1890 |
| Tmin | 1953 | 1775 | 1953 | 1890 | 1953 | 1890 |
| słońce (godz.) | 1550 | 1437 | 1581 | 1526 | 1610 | 1527 |
| opad | 188 | 168 | 186 | 185 | 186 | 180 |
| wilgotność / widzialność | 185 | 167 | 185 | 177 | 184 | 178 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 1953 | 1953 | 1890 | 1953 | 1890 | 1953 |
| Tmin | 1953 | 1953 | 1890 | 1953 | 1890 | 1953 |
| słońce (godz.) | 1579 | 1583 | 1589 | 1636 | 1558 | 1611 |
| opad | 188 | 190 | 210 | 215 | 210 | 217 |
| wilgotność / widzialność | 184 | 184 | 207 | 210 | 207 | 215 |
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. |
