The temperature in some places of Dong Nai and Tay Ninh province kept at 17.5- 18.6 degrees Celsius.
From December 19- 22, the daytime temperature is expected to continue reducing at 20- 21 degrees Celsius.
The National Hydrology Meteorology Forecast Center said that Hanoi experienced cold weather at temperature of 9-11 degrees Celsius while the temperature in Sa Pa (Lao Cai), Trung Khanh (Cao Bang) and Mau Son (Lang Son) reached at 2- 4.4 degrees Celsius.
The lowest temperature in the north- central region also dropped down 10-13 degrees Celsius.
In the coming days, in the north and north- central region are warned to suffer damaging cold on the large scale, hoarfrost and unexpected forest fire.