Pierce’s disease (PD) is a vascular disease of grapevines caused by the xylem-limited bacterium Xylella fastidiosa (Xf), which is vectored by xylem feeding Auchenorrhynchans. Vineyards in six Vitis vinifera growing regions of Virginia were monitored for insect vectors of Xf during the 2006 and 2007 growing seasons. Vineyards were scouted for PD infected vines and sampled for Xf using DAS-ELISA in October 2006 and 2007. According to historical climate records, four of these regions were considered low to moderate risk of PD infection, two regions considered high risk. Species known to be efficient vectors of the bacterium, Oncometopia orbona Stal and Graphocephala versuta Say (Hemiptera: Cicadellidae), were trapped in all six growing regions. Symptomatic vines were observed and presence of Xf was confirmed in all six growing regions. Vine loss was observed in one of the four growing regions thought to be at moderate risk. This study uses geographical representation of climatological data to estimate risk for Pierce's disease.