The currency had touched 171.80 per dollar on Friday, going below the previous low of 171.60 hit on Oct. 10.

It closed at 171.60/80  per dollar on Friday.

The rupee has weakened 1.66 percent against the dollar so far this month, extending the 4.7 percent loss in September. It has declined 11.99 percent so far this year, Refinitiv Eikon data showed.