The rupee strengthened by 22 paise to 63.83 against the dollar at the interbank foreign exchange market today on continuous selling of the US currency by exporters and banks.

According to forex dealers, dollar's weakness against major currencies overseas boosted the rupee.

The dollar fell to its weakest level since 2015 as experts warn that Hurricane Irma could have a devastating impact on the US. The powerful storm has left a trail of death and destruction in the Caribbean and is headed towards the US.

The European Central Bank has also raised its economic growth forecast for this year, which boosted the euro.

Besides, increased selling of the dollar by exporters and banks and a firm domestic equity market supported the rupee, the dealers added.

Yesterday, the rupee had closed five paise higher at 64.05 against the American unit.

Meanwhile, the benchmark BSE Sensex was trading up 78.29 points or 0.25 per cent at 31,741.03.