Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 1219 | 1120 | 1235 | 1196 | 1230 | 1195 |
| Tmin | 1216 | 1117 | 1228 | 1194 | 1229 | 1189 |
| słońce (godz.) | 351 | 353 | 294 | 341 | 376 | 394 |
| opad | 808 | 731 | 809 | 787 | 806 | 780 |
| wilgotność / widzialność | 180 | 166 | 182 | 174 | 178 | 174 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 1236 | 1232 | 1208 | 1241 | 1224 | 1265 |
| Tmin | 1235 | 1226 | 1219 | 1255 | 1216 | 1265 |
| słońce (godz.) | 333 | 374 | 391 | 390 | 363 | 343 |
| opad | 808 | 814 | 822 | 851 | 816 | 220 |
| wilgotność / widzialność | 180 | 174 | 195 | 197 | 198 | 208 |
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. |
