Bangladesh Meteorological Department (BMD) on Monday forecasted rain in different parts of the country in next 24 hours commencing 9am.
"Light to moderate rain/thunder showers accompanied by temporary gusty/squally wind and lightning flashes is likely to occur at many places over Mymensingh and Sylhet divisions; at a few places over Rangpur, Dhaka and Chittagong divisions and at one or two places over Rajshahi, Khulna and Barisal divisions," said a Met office bulletin issued in the morning.
Besides, it said, moderately heavy to heavy falls may occur at places over Mymensingh and Sylhet divisions.
Day temperature may remain nearly unchanged, and night temperature may rise slightly over the country.
A mild heatwave is sweeping over the districts of Madaripur, Rajshahi, Pabna, Lakshmipur, Khulna, Satkhira and Jessore, and it may continue, the bulletin said.
The highest temperature on Sunday was recorded 36.6°C in Koyra under Khulna division, while Monday's minimum temperature is 20.5°C in Tangail.
The sun sets at 6:35pm on Monday and rises at 5:14am on Tuesday in Dhaka.