Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 1240 | 1129 | 1240 | 1200 | 1240 | 1200 |
| Tmin | 1240 | 1129 | 1240 | 1200 | 1240 | 1200 |
| słońce (godz.) | 1261 | 1141 | 1257 | 1243 | 1288 | 1257 |
| opad | 188 | 168 | 186 | 181 | 186 | 180 |
| wilgotność / widzialność | 185 | 167 | 185 | 179 | 185 | 179 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 1240 | 1240 | 1200 | 1240 | 1200 | 1240 |
| Tmin | 1240 | 1240 | 1200 | 1240 | 1200 | 1240 |
| słońce (godz.) | 1270 | 1305 | 1289 | 1325 | 1287 | 1332 |
| opad | 188 | 190 | 210 | 215 | 210 | 217 |
| wilgotność / widzialność | 184 | 184 | 207 | 208 | 206 | 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. |
