Muted demand from consuming industries at domestic spot market also put pressure on prices.
At the Multi Commodity Exchange, copper for delivery in August contracts declined by Rs 1.70 or 0.51 per cent to Rs 332.30 per kg in a business turnover of 1,817 lots.
The metal for delivery in November fell Rs 1.70 or 0.50 per cent to Rs 338.80 per kg in a business volume1 of 57 lots.
Analysts said a weak trend overseas following a seasonal slowdown in China's demand for metal and rising inventories led to fall in copper prices at futures trade here.
Globally, copper for delivery in three-month retreated 0.5 per cent to USD 4,893 per tonne at the London Metal Exchange.