June same-store sales came in negative and more or less matched June's numbers. According to Retail Metrics, same-store sales fell 4.7 percent. Retail Forward's stats show a 4.6 percent decline. (Retail Forward's data includes 32 retailers and the results can be viewed in in this PDF.) ICSC's data, meanwhile, shows a 5.0 percent decline, based off 33 retailers. (The report can be downloaded here if you're a member of ICSC.) ICSC's data charted from 1993 to the present can be viewed below. Retail Sails also has a summary looking at 34 retailers.
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