According to Lao Cai Hydrometeorological Station, on January 5, in low mountainous areas, the temperature is from 16-23 degrees Celsius, in high mountainous areas it is cloudy, no rain, very cold, very cold, very cold at night, very cold in the morning, foggy in the early morning, temperature is from 9-19 degrees Celsius.
For Sa Pa town, the weather is extremely cold, with fog in the early morning, northeast wind level 2, temperature from 7-13 degrees Celsius. Bac Ha district is extremely cold, with freezing cold at night and fog in the early morning, temperature from 9-19 degrees Celsius.
On the same morning, the temperature at Fansipan peak (Sa Pa) dropped to minus 3 degrees Celsius, causing snow to cover the area. Trees on Fansipan peak were also frozen by the cold weather.
At the same time, the temperature recorded in Tam Duong district, Lai Chau province was 0 degrees Celsius.

In another development, according to Head of Mau Son Hydrometeorological Station Hoang Quoc Huy (Lang Son), the temperature at the top of Mau Son only fluctuates at 7-8 degrees Celsius.
However, the cold air is still continuing to strengthen, and temperatures are forecast to continue to drop.
According to the National Center for Hydro-Meteorological Forecasting, on January 5, the temperature in the Northwestern provinces will range from 10-21 degrees Celsius, cloudy, no rain at night, scattered light fog in the early morning, sunny during the day, light wind. Cold at night and in the morning.
Weather forecast today in Son La, Lai Chau, Hoa Binh, Dien Bien, Yen Bai, Lao Cai, sunny. Lowest temperature from: 11-14 degrees Celsius, some places below 11 degrees Celsius. Highest temperature from: 22-25 degrees Celsius, some places above 25 degrees Celsius.