Light to moderate rain or thunder showers accompanied by temporary gusty wind and lightning flashes is likely to occur at many places over Rangpur, Mymensingh and Sylhet divisions in 24 hours till 9:00am Monday.
Dhaka Met office has issued the same forecast for a few places over Dhaka and Chattogram divisions and at one or two places over Rajshahi, Khulna and Barishal divisions.
Moderately heavy to heavy falls are likely at places over the country during the period, according to the Met office forecast.
A mild to moderate heat wave is sweeping over Khulna division and the regions of Rajshahi and Pabna and it may continue.
Overall day and night temperature over the country may rise slightly, said the met office.
A Westerly low, lying over India's Bihar and adjoining areas, may impact northern part of Bangladesh.
Southwest monsoon is less active over Bangladesh and moderate over north Bay.