The leu opened at 4.277/4.280 to the euro, weaker than 4.260/4.262 at closing Friday.
Within the first hour of trading, the leu stayed close to the 4.28 level versus the euro.
The central bank published Friday a leu-to-euro reference of 4.271 units, stronger than the previous reference of 4.294 units.
On the money market, overnight rates stayed at 4.55%-5% a year.