Retailers from discounter Target to department-store chain Macy's reported better-than-expected sales in March in the latest sign that Americans are feeling better about the economy.

Fourteen-year-old Khine Thwin tries on sunglasses at a Hot Topic retail store at the Serramonte Mall in Daly City, CA.

A combination of warm weather and high demand for spring fashions boosted revenue for the month, but analysts say there's much more than higher temperatures at play.