Light to moderate rain/thunder showers accompanied by temporary gusty wind is likely to occur in Mymensingh, Dhaka, Khulna, Barisal and Sylhet divisions.
The weather is likely to remain mainly dry with partly cloudy skies elsewhere in the country, the Met Office said on Tuesday.
According to the Meteorological Department, the extension of western low pressure is located over West Bengal and adjoining areas of India.
Seasonal normal low pressure is located over South Bay of Bengal.
Light to moderate fog may fall anywhere in the country from late night to early morning.
The night temperature may increase by 1-2 degrees Celsius across the country and the day temperature may drop slightly.
The relative humidity of the air in Dhaka at 6am on Tuesday was 75%.
The sun will set in Dhaka at 5:57pm while sunrise on Wednesday will be at 6:28am.
The highest temperature across the country was recorded at 32.0 degrees Celsius in Sitakunda on Monday while the lowest temperature at 11.03 degrees Celsius was at Tentulia in Panchagarh.