Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 1180 | 1112 | 1238 | 1193 | 1211 | 1196 |
| Tmin | 1178 | 1112 | 1232 | 1193 | 1212 | 1195 |
| słońce (godz.) | 421 | 402 | 449 | 437 | 417 | 466 |
| opad | 188 | 169 | 186 | 185 | 188 | 184 |
| wilgotność / widzialność | 181 | 163 | 183 | 176 | 181 | 175 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 1231 | 1235 | 1208 | 1257 | 1220 | 1256 |
| Tmin | 1232 | 1238 | 1207 | 1261 | 1224 | 1258 |
| słońce (godz.) | 478 | 453 | 498 | 446 | 471 | 478 |
| opad | 187 | 190 | 211 | 217 | 211 | 232 |
| wilgotność / widzialność | 180 | 183 | 205 | 207 | 203 | 204 |
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. |
