Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 244 | 192 | 221 | 214 | 234 | 237 |
| Tmin | 249 | 196 | 213 | 219 | 237 | 243 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 305 | 269 | 309 | 317 | 335 | 334 |
| wilgotność / widzialność | 67 | 24 | 38 | 35 | 44 | 55 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 250 | 257 | 225 | 257 | 233 | 248 |
| Tmin | 251 | 256 | 228 | 252 | 234 | 249 |
| słońce (godz.) | 0 | 0 | 0 | 0 | 0 | 0 |
| opad | 350 | 351 | 320 | 340 | 314 | 336 |
| wilgotność / widzialność | 60 | 61 | 50 | 69 | 49 | 66 |
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. |
