Some 2,481,000 people have fled Ukraine to Poland since the war began, the Polish Border Guard says.
However, numbers crossing the border have fallen significantly in recent weeks.
On Sunday 22,300 crossed, down 6% from Saturday, the agency wrote on Twitter, and well below the record of 142,300 set on 6 March.
The average daily number of people crossing the border into Poland before the war started was 16,800.
There are also increasing numbers going to Ukraine.
Since the war began, 457,000 people have entered Ukraine via Poland, the agency said.
On Sunday alone, 15,000 people crossed into Ukraine from Poland, down from 21,000 on Saturday.
Some of the people fleeing Ukraine have already left Poland. Warsaw University migration research Prof Maciej Duszczyk estimates about 1.3 to 1.4 million of the refugees remain.
-BBC-