Based on tree-ring width data of Quercus wutaishanica forest in Beijing Dongling Mountain, we detected response sensitivity of radial growth to local climate variables during the overlap period (1951-2010) between tree ring and climate data. Correlation analysis indicated that yearly growth was strongly correlated with summer temperature (from July to September) and precipitation (July), indicating summer drought stress was the major constraint for tree growth. Tree radial growth was also positively correlated with growing season (from April to October) Palmer Drought Severity Index (PDSI), further confirming high sensitivity of tree growth to moisture condition. Additionally, climate condition in spring had a partial influence on tree growth, representing the significantly negative correlation with May temperature. Moving correlation analysis revealed that the relationship between tree rings and summer temperature (negative) and precipitation (positive) has become strengthened in the recent years. This predominantly show that the influence of summer drought stress on radial growth becomes more evident recently. Climate change models predict higher temperatures and increasing drought stress in the study area. The elevated dry climate will increasingly threaten Q. wutaishanica forest growth, allowing a downward trend in Net Primary Production (NPP), and the weakened ability of terrestrial carbon sink of local forests should be expected.