More rains are likely to drench Bangladesh in 24 hours commencing 9 am on Monday, said the weather department.

"Light to moderate rain or thunder showers accompanied by temporary gusty wind and lightning flashes are likely at many places over Khulna division and at a few places over Rangpur, Rajshahi, Dhaka, Mymensingh, Barishal, Chattogram and Sylhet divisions with moderately heavy falls at places over the country," said a Met Office bulletin.

Rainfall activity may increase in next three days.

Day and night temperatures may remain nearly unchanged over the country, it added.

The weather office recorded the highest 41 mm rainfall in Chattogram in 24 hours till 6am on Monday.

Both the highest and the lowest temperatures were recorded in Sreemangal of Sylhet division at 35.3 degrees Celsius and 23.8 degrees, respectively.

Meanwhile, a low pressure area has formed over North Bay and adjoining area now lies over Northwest Bay and adjoining area.

The axis of monsoon trough runs through Rajasthan, Punjab, Haryana, Uttar Pradesh, Bihar, West Bengal, centre of the low to Assam across southern part of Bangladesh, said the bulletin.