Jashore had the previous highest temperature of the season at 42.6C
She reached Dhaka on a Biman Bangladesh Airlines flight on Saturday night. She was greeted by Cabinet members and top government officials at the airport.
Hasina went to Italy on Oct 15 to attend the 10th ASEM summit.
At the summit she pitched for better interactions and connectivity between the two continents.
Hasina also attended a reception hosted by the ruling Awami League's Italian chapter on Friday in Milan.
Bangladesh became a member of ASEM in 2012.