The dollar was firm against some global currencies which also weighed on the rupee, dealers said.
On Friday, the local currency ended 5 paise lower at 66.76 a dollar on persistent demand for the US dollar from banks and importers and weakness in equities.
Meanwhile, the benchmark BSE Sensex fell by 263.24 points or 0.98 per cent to 26,372.51 in early trade.
PTI