Total sales were up 8.8% over April 2009.
Sales excluding autos and auto parts jumped 0.4% from March. Analysts expected sales excluding autos to increase by 0.5%.
Consumer spending accounts for two-thirds of U.S. economic activity, so related reports such as retail sales are closely watched to gauge recovery.
Last week, chain stores reported gains in sales at stores open more than a year for April. Thomson Reuters said the overall 0.5% increase was the eighth straight monthly gain.
But sustained growth could be difficult, Dales warned.
"The continued weak fundamentals of heavy indebtedness, tight credit and high unemployment ... will mean that consumer recovery will not set the world alight," he said.
Retail SalesConsumer confidence nearly doubles locally