Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 1244 | 1147 | 1271 | 1227 | 1263 | 1226 |
| Tmin | 1246 | 1149 | 1269 | 1226 | 1263 | 1228 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 202 | 197 | 231 | 229 | 244 | 234 |
| wilgotność / widzialność | 179 | 160 | 173 | 167 | 170 | 165 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 1261 | 1260 | 1251 | 1293 | 1244 | 1274 |
| Tmin | 1261 | 1261 | 1251 | 1293 | 1245 | 1269 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 215 | 223 | 241 | 240 | 208 | 220 |
| wilgotność / widzialność | 169 | 167 | 200 | 203 | 200 | 180 |
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. |
