The Bangladesh Meteorological Department (BMD) has forecast rain at several places in six divisions, including Dhaka, over the next 24 hours from 9:00am on Monday.
"Rain or thundershowers are likely to occur at a few places over Chattogram division and at one or two places over Rangpur, Rajshahi, Dhaka, Khulna and Barishal divisions," said a Met Office bulletin.
Weather may remain mainly dry elsewhere, with a temporarily partly cloudy sky, it said.
Night and day temperatures may fall slightly across the country, according to the bulletin.
A seasonal low lies over the South Bay, extending its trough to the Northeast Bay.