Number of days available for climatic review
| parametr | sty | lut | mar | kwi | maj | cze |
| Tmax | 1007 | 897 | 1021 | 989 | 1021 | 989 |
| Tmin | 1008 | 892 | 1021 | 986 | 1019 | 988 |
| słońce (godz.) | 62 | 84 | 93 | 90 | 93 | 90 |
| opad | 184 | 168 | 187 | 181 | 186 | 180 |
| wilgotność / widzialność | 185 | 166 | 185 | 178 | 184 | 178 |
| parametr | lip | sie | wrz | paź | lis | gru |
| Tmax | 1021 | 1022 | 1017 | 1045 | 1016 | 1054 |
| Tmin | 1022 | 1024 | 1017 | 1048 | 1019 | 1053 |
| słońce (godz.) | 93 | 93 | 90 | 93 | 90 | 93 |
| opad | 186 | 190 | 212 | 215 | 210 | 216 |
| wilgotność / widzialność | 184 | 183 | 206 | 210 | 207 | 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. |
