This study establishes a homogenized daily maximum and minimum temperature series for Baoding in Hebei Province based on daily observations collected by the National Meteorological Information Centre from 1919 to 2019. Quality control is conducted to remove error data resulting from manual observation or recording, instrument malfunctions and digital inputs. Then, missing observations are interpolated using the standardized series method with homogenized daily temperature data in Tianjin over a century-long scale. Significant breakpoints caused by changes in interpolation, station relocation, and instrument manufacturers are detected using a penalized maximal t-test (PMT) with annual and monthly reference series constructed by two means, and adjusted by Quantile Matching (QM) daily reference series from Berkeley Earth-daily data. The characteristics of inter-annual, decadal, and trend changes are consistent with those from Berkeley Earth-monthly, CRUTS 4.03, and GHCNV3. The warming change induced by the rapid urban development in the Baoding region is well reflected when simultaneously compared with the whole Beijing-Tianjin-Hebei region. Furthermore, the warming trends of the annual and autumn lowest minimum temperature (TNn) are 0.340 ℃/(10 a) and 0.404 ℃/(10 a) (95% significance level), respectively, and the corresponding diurnal temperature range (DTR) are -0.118 ℃/(10 a) and -0.215 ℃/(10 a) (95% significance level). The warming change in annual and seasonal temperature extremes in Baoding have also increased significantly since 1912.