Statistics Sweden and the research company HUI released the figures on Friday.
"Last year was the worst since 1996," says Elin Gabrielsson at HUI, which maintains its forecast of a 2.5 percent increase in retail sales this year compared to 2011.
Expensive goods such as furniture and electronics increased by 1.8 percent in June, which HUI attribute to the weather and the football championships, which ran for most of June.
"People bought widescreen TV's ahead of the Euros and the Olympics," says Gabrielsson. "When it rains, people stay inside more and invest in furniture and interior decoration."