After a slight decrease from severe levels, the mercury is hovering around 40 degrees Celsius in most regions
He made the appeal while exchanging greetings with Christians and other distinguished guests at his official residence Bangabhaban on Sunday.
"Bangladesh is a country of communal harmony. The people of the country are bound by love and harmony from time immemorial and we all have to play an effective role in further strengthening this tradition of harmony," he said.
Cardinal Patrick D Rozario, ambassadors of different countries exchanged greetings with the president and his wife Rashida Khanam. Religious Affairs Minister Matior Rahman was present on the occasion.
A group of singers performed the Christmas carol. The president then cut a cake at the Darbar Hall.