Gold traded lower on a stronger U.S. dollar. The U.S. dollar rose against the other major currencies after the referendum in Greece. 61.31% of Greeks voted "No" in the Sunday's referendum, while 38.69% of Greeks voted "Yes".

Greek Finance Minister Yanis Varoufakis has resigned after the referendum.

According to a Greek government official, Greek Prime Minister Alexis Tsipras spoke by phone on Monday with Germany's Chancellor Angela Merkel. He agreed to present new Greek proposal at Tuesday's European Union (EU) summit.

August futures for gold on the COMEX today fell to 1161.90 dollars per ounce.