A cold front from mainland China will cause cold and wet weather conditions in northern Vietnam this week.
The front is moving south from mainland China and is forecast to hit northern Vietnam by Tuesday, the central weather forecaster said.
Some parts of the region will experience light rain as it approaches, the center added.
Showers and thick fog are expected in mountainous areas while winds will swirl over the mainland and toward the coast.
The Gulf of Tonkin can also anticipate strong winds and rough seas.
Frost is then expected in the evening, the center said, adding that the mountains will experience icy conditions. Temperatures will also drop in the north-central region.
Over the next few days, temperatures are expected be between 19 and 21 degrees Celsius in Hanoi, 15 and 17 degrees Celsius in the mountains, and 13 and 15 degrees Celsius in Mount Mau Son, in the northern province of Lang Son.
In the west of the northern region maximums are expected to range between 20 and 22 degrees Celsius, while temperatures will range from 11 to 13 degrees Celsius in Sa Pa.