BAYWRF data were produced using the atmospheric model WRF v. 4.1 configured with two nested domains, of 7.5- and 1.5-km grid spacing, centred over Bavaria. The model was forced at its outer lateral boundaries by ERA5 reanalysis data at three-hourly frequency. The dataset covers the period of 1 September 1987 to 31 August 2018. Here, we provide a selection of daily mean data from the finest WRF domain (D2; 1.5-km grid spacing) cropped to the extent of Bavaria and below ~ 200 hPa. For these data, perturbation and base-state atmospheric pressure (WRF variables P and PB) and geopotential (PH and PHB) were combined to generate full model fields, while perturbation potential temperature (T) was converted to atmospheric temperature. These data were generated as part of the BayTreeNet project, which aims to investigate the impact of climate change on forest ecosystems in Bavaria. The BayTreeNet project is sponsored by the Bavarian State Ministry of Science and the Arts in the context of the Bavarian Climate Research Network (bayklif). Further information about these data and how they were generated is provided in: Collier, E. and Mölg, T.: BAYWRF: a high-resolution present-day climatological atmospheric dataset for Bavaria, Earth Syst. Sci. Data, 12, 3097–3112, https://doi.org/10.5194/essd-12-3097-2020, 2020.