Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 260 | 238 | 257 | 283 | 281 | 284 |
| Tmin | 397 | 360 | 394 | 415 | 427 | 410 |
| słońce (godz.) | 75 | 68 | 73 | 72 | 67 | 75 |
| opad | 102 | 103 | 101 | 133 | 128 | 131 |
| wilgotność / widzialność | 61 | 55 | 60 | 79 | 80 | 81 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 267 | 281 | 278 | 289 | 274 | 279 |
| Tmin | 414 | 422 | 417 | 425 | 404 | 428 |
| słońce (godz.) | 57 | 93 | 101 | 105 | 93 | 92 |
| opad | 135 | 132 | 125 | 128 | 127 | 149 |
| wilgotność / widzialność | 71 | 76 | 81 | 80 | 75 | 76 |
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. |
