A mild cold wave is sweeping 21 districts, including almost all the districts in Rangpur and Rajshahi divisions, and the mercury may dip further across Bangladesh, said the Bangladesh Meteorological Department on Monday morning.

The lowest minimum temperature in Dhaka was recorded as 12.3 degrees Celsius on Monday morning and this was the lowest temperature in the capital in the ongoing winter season, said meteorologist Md Omar Faruque.

The country’s lowest minimum temperature of 08.1 degrees Celsius was recorded at Dinajpur and Badalgachhi on Monday, he said.

‘Mild cold wave is sweeping over Rangpur and Rajshahi divisions and the districts of Jashore, Kushtia, Chuadanga, Tangail, Madaripur and Kishoreganj and it may continue,’ according to the regular weather bulletin of the BMD.

Temperature between 8 to 10 degrees Celsius is considered a mild cold wave, 6 to 8 degrees Celsius a moderate cold wave, and less than 6 degrees Celsius a severe cold wave.

‘Night temperature may fall by (1-2)°C and day temperature may fall slightly over the country,’ it said.

‘Moderate to thick fog may occur over the country from midnight to morning and it may continue till noon at places. Air navigation, inland river transport and road communication may be disrupted due to thick fog,’ the bulletin said.

It said that weather might remain dry with a temporary partly cloudy sky over the country.