According to the National Center for Hydro-Meteorological Forecasting, tomorrow (February 4), the cold air mass will continue to affect other places in the North, Northwest, North Central and South Central regions, then affect some places in the South Central region.
In the North and North Central regions tomorrow, it will be cold, especially in the mountainous areas of the North, it will be very cold, with some places experiencing severe cold; in the area from Quang Binh to Hue, it will be cold. The lowest temperature in this cold air mass in the North and Thanh Hoa, Nghe An will generally be from 11-14 degrees Celsius.
Hanoi area is cold. The lowest temperature in this cold air mass is commonly 12-14 degrees Celsius.
Due to the influence of cold air, from tomorrow, the Central Central region will have rain, showers, locally heavy rain and thunderstorms. People and tourists going on spring outings and outdoor activities should be on guard against thunderstorms with the possibility of tornadoes, lightning and strong gusts of wind.

Hanoi
Lowest temperature: 12-15 degrees Celsius Highest temperature: 17-20 degrees Celsius
Cloudy, some rain, sunny in the afternoon. Northeast wind level 3. Cold.
Northwest
Lowest temperature: 12-15 degrees Celsius, some places below 10 degrees Celsius Highest temperature: 16-19 degrees Celsius, some places above 19 degrees Celsius
Cloudy, some rain, sunny in the afternoon. Light wind. Cold, some places very cold.
Northeast
Lowest temperature: 12-15 degrees Celsius; mountainous areas 8-10 degrees Celsius, high mountainous areas in some places below 6 degrees Celsius Highest temperature: 17-20 degrees Celsius
Cloudy, some rain, sunny in the afternoon. Northeast wind level 3, coastal areas level 3-4, some places have gusts of level 6. Cold; mountainous areas are very cold, some places are very cold.
Thanh Hoa to Hue
Lowest temperature: 13-16 degrees C; South 16-18 degrees C Highest temperature: 19-22 degrees C
Cloudy, some rain in the North, less cloudy in the afternoon and sunny; rain, showers in the South, some places have moderate rain, heavy rain. North to northwest wind level 3, coastal areas level 3-4, some places have gusts of level 6. Cold weather.
Da Nang to Binh Thuan
Lowest temperature: 18-21 degrees C, South 21-23 degrees C Highest temperature: 23-26 degrees C; South 27-30 degrees C
In the North, it is cloudy with rain and showers, locally heavy rain; in the South, it is cloudy with showers in some places. Northeast wind level 3. In the North, it is cold at night and in the morning.
Central Highlands
Lowest temperature: 15-18 degrees Celsius Highest temperature: 27-30 degrees Celsius
Cloudy, some showers at night, sunny during the day. Northeast wind level 3. Cold at night and morning.
Southern Vietnam
Lowest temperature: 21-24 degrees Celsius Highest temperature: 30-33 degrees Celsius
Cloudy, no rain at night, sunny during the day. Northeast wind level 3.