On Friday, the official rate was set at 4.4852 per euro.
Against the US dollar, the leu’s reference weakened 0.4% to 3.6404 units, from 3.6250 units Friday.
The leu opened at 4.48/4.485 to the euro, stronger from 4.485/4.487 to the euro at previous closing, but it soon weakened towards 4.49 units in a quiet market. By mid-day, the leu extended losses and traded at 4.493/4.496 per euro at around 13:00 local time (GMT1000).
On the money market, overnight rates were at 4.8%-5.3% a year, slightly higher on the day.