According to the National Center for Hydro-Meteorological Forecasting, from around tomorrow evening (March 28), cold air will affect the Northeast, North Central and some places in the Northwest, then spread to other places in the Northwest and some places in the Central Central.
The Northwest will be sunny tomorrow, the Northwest will be hot in some places. From night the weather will turn cold. The Northeast will have rain in some places, early morning there will be scattered fog and light fog, sunny afternoon; especially in coastal areas, there will be light rain, drizzle and scattered fog at night and in the morning. From night the weather will turn cold, with rain in some places.
The North and Central Central regions will have sunny days, some places will have hot weather, especially in the mountainous areas of the West from Nghe An to Hue. In the North tomorrow night, there will be scattered rain, showers and thunderstorms in some places. The North Central region will turn cold from the night of March 28.
Other areas will have showers and thunderstorms in some places in the evening and at night, sunny during the day, and hot in some places. People and tourists need to be on guard during thunderstorms with the possibility of tornadoes, lightning, hail and strong gusts of wind.

Hanoi
Lowest temperature: 21-23 degrees Celsius Highest temperature: 28-30 degrees Celsius
Cloudy, with rain in some places, fog and light fog scattered in the early morning, sunny in the afternoon. Southeast to south wind level 2-3.
Northwest
Lowest temperature: 20-23 degrees Celsius, some places below 20 degrees Celsius Highest temperature: 30-33 degrees Celsius, some places in the Northwest region above 35 degrees Celsius
Cloudy, showers and thunderstorms in some places in the evening and at night; sunny during the day, especially in the Northwest region. Light wind. During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
Northeast
Lowest temperature: 21-24 degrees Celsius, mountainous areas below 20 degrees Celsius Highest temperature: 28-31 degrees Celsius
Cloudy, with rain in some places, early morning fog and light fog scattered, afternoon and evening less clouds and sunshine; especially coastal areas have light rain, drizzle and scattered fog at night and in the morning. Southeast to south wind level 2-3.
Thanh Hoa to Hue
Lowest temperature: 21-24 degrees Celsius Highest temperature: 30-33 degrees Celsius, in the mountainous areas of the West 34-36 degrees Celsius
Cloudy, showers and thunderstorms in some places in the evening and at night, sunny during the day, especially in the mountainous areas of the West. South to southwest wind level 2-3.
Da Nang to Binh Thuan
Lowest temperature: 22-25 degrees Celsius Highest temperature: 30-33 degrees Celsius, some places above 33 degrees Celsius
Cloudy, no rain at night; sunny during the day. East to southeast wind level 2-3.
Central Highlands
Lowest temperature: 19-22 degrees Celsius Highest temperature: 31-34 degrees Celsius, some places above 35 degrees Celsius
Cloudy, showers and thunderstorms in some places in the evening and at night, sunny during the day, some places have hot sunshine. Light wind.
Southern region
Lowest temperature: 23-26 degrees Celsius Highest temperature: 32-35 degrees Celsius, some places above 35 degrees Celsius
Cloudy, showers and thunderstorms in some places in the evening and at night, sunny during the day, some places have hot sunshine. Light wind.