Bangladesh Meteorological Department predicted rain across the country in the 24 hours from 9:00am today.
Rainfall may increase across the country over the next 72 hours, it said.
"Light to moderate rain/thundershowers accompanied by temporary gusty wind is likely at most places in Rangpur, Mymensingh and Sylhet divisions; at many places in Rajshahi, Chattogram and Dhaka divisions and at a few places in Khulna and Barishal divisions with moderately heavy to very heavy falls at places over Rangpur, Mymensingh, Chattogram and Sylhet divisions," said a Met office bulletin.
Monsoon is fairly active over Bangladesh and moderate over the north Bay, it added.
Day and night temperatures may remain nearly unchanged over the country.
The country`s highest 112 mm rainfall was recorded in Sylhet district in 24 hours till 6 am today.