STOCKHOLM, June 18 (Reuters) - Hennes & Mauritz, the world’s third-biggest clothing retailer by sales, posted second-quarter pretax profits and May sales above market expectations on Wednesday, helped by a weak US dollar and good weather.

The company, founded in Sweden in 1947, made a pretax profit of SKr5.43bn ($901m) against a mean forecast of SKr5.25bn in a Reuters poll of analysts and SKr5.13bn in the same period the previous year.