The temperature in Chuadanga, a southwestern district of the country, dropped to 9.8°C at 9am on Friday.
A mild cold wave was blowing over the region, and the temperature will drop further day by day, according to Rakibul Hasan, senior observer at the met office in Chuadanga.
The temperature was 10°C at 6 am and further dropped to 9.8°C by 9am, accompanied by 88% humidity.
The harsh weather has led to a surge in cold-related illnesses, particularly among vulnerable groups like children and the elderly.
Dr Rakib Sadi, resident medical officer at Chuadanga Sadar Hospital, said approximately 3,000 patients received treatment in the past week alone and among them, the number of children and the elderly is high.
Besides, farmers are more concerned about the dense fog. The district Department of Agricultural Extension office warned that high fog density and stability could adversely affect new paddy seedbeds.