During the reporting month, the central bank bought $4.020 billion of the US dollar, while sold $10.204 billion in the spot market, according to the recent RBI data.
In May and April, RBI had net sold $5.767 billion and $2.483 billion of the US dollar, respectively.
RBI maintains that its intervention in the foreign exchange market is to curb volatility in the rupee and not to target a level of the domestic currency.
In FY18, the apex had net purchased $33.689 billion from the spot market. It had bought $52.068 billion from the spot market, while selling $18.379 billion.
In FY17, RBI had bought $12.351 billion of the US dollar on a net basis.
In the forward dollar market, the outstanding net forward purchase at the end of June was $10.689 billion.
The net forward purchase at the end of May was $11.252 billion, RBI said.