The dominant atmospheric circulation pattern that governs European summer climate is a seesaw between the geopotential height fields over northwestern versus southeastern Europe: when a low occurs over the British Isles, a blocking-like pattern dominates the Balkans, and vice versa. One phase of this seesaw was exemplified by the summer of 2012, when anomalously wet and cold conditions over northwestern Europe co-occurred with dry and hot conditions over souteastern Europe. We here present a summer temperature reconstruction (1274-2009 CE) for the
