According to the forecast of the National Center for Hydro-Meteorological Forecasting, currently (May 23), cold air from the North is moving south.
From the evening of May 23 to May 24, Viet Bac, Northeast: moderate rain, heavy rain and thunderstorms. Rainfall: 40-100mm, locally over 200mm.
Northwest, Northern Delta: moderate rain, heavy rain and thunderstorms. Rainfall: 30-70mm, locally over 120mm
The North Central region will have moderate rain, heavy rain and thunderstorms from the evening of May 23 to the night of May 24. Rainfall 30-80mm, locally over 150mm.
From around May 25, the cold air will continue to strengthen and affect the North Central region and some places in the Northwest.
Due to the influence of cold air, the North: has moderate rain, heavy rain and thunderstorms, some places have very heavy rain; from the night of May 24, the rain will gradually decrease.
The North Central region will have moderate rain, heavy rain and thunderstorms, locally very heavy rain; from May 25, the rain will decrease.
Central Central region has showers and thunderstorms in some places in the evening and at night; sunny during the day.
The South Central region will have scattered showers and thunderstorms in some places, especially in the area from Khanh Hoa to Binh Thuan in the afternoon and evening, there will be scattered showers and thunderstorms, locally heavy rain.
The Central Highlands and the South will have rain, moderate rain and scattered thunderstorms, locally heavy to very heavy rain, the rain will be concentrated in the afternoon and night.

Weather forecast for tomorrow in Hanoi
Cloudy, moderate rain, heavy rain and thunderstorms, locally very heavy rain. Light wind, tomorrow turn to northeast level 2-3. During thunderstorms, there is a possibility of tornadoes, lightning and strong gusts of wind.
Lowest temperature: 21-23 degrees Celsius Highest temperature: 25-28 degrees Celsius
Weather forecast for tomorrow in the Northwest region
Cloudy, moderate rain, heavy rain and thunderstorms, locally very heavy rain. Light wind. During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
Lowest temperature: 21-24 degrees Celsius, some places below 21 degrees Celsius Highest temperature: 25-28 degrees Celsius
Weather forecast for tomorrow in the Northeast region
Cloudy, moderate rain, heavy rain and thunderstorms, locally very heavy rain. Light wind, tomorrow turn to northeast level 2-3.
During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
Lowest temperature: 21-24 degrees Celsius, mountainous areas below 21 degrees Celsius Highest temperature: 25-28 degrees Celsius
Weather forecast for tomorrow in the area from Thanh Hoa to Hue
The North is cloudy, with moderate rain, heavy rain and thunderstorms, some places have very heavy rain; the South is cloudy, with showers and thunderstorms in some places in the evening and at night, and sunny during the day. Light wind. During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
Lowest temperature: 23-26 degrees Celsius Highest temperature: 27-30 degrees Celsius, South 31-34 degrees Celsius
Weather forecast for tomorrow in the area from Da Nang to Binh Thuan
Cloudy, in the North there will be showers and thunderstorms in some places in the late afternoon and night, sunny during the day; in the South there will be showers and thunderstorms in some places, in the afternoon and evening there will be scattered showers and thunderstorms, locally heavy rain in some places. Light wind.
During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
Lowest temperature: 24-27 degrees Celsius Highest temperature: 31-34 degrees Celsius
Weather forecast for tomorrow in the Central Highlands
Cloudy, tonight and tomorrow afternoon there will be rain, moderate rain and scattered thunderstorms, locally heavy to very heavy rain. Southwest wind level 2-3. During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
Lowest temperature: 21-24 degrees Celsius Highest temperature: 29-32 degrees Celsius
Weather forecast for tomorrow in the Southern region
Cloudy, tonight and tomorrow afternoon there will be rain, moderate rain and scattered thunderstorms, locally heavy to very heavy rain. Southwest wind level 2-3. During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
Lowest temperature: 24-27 degrees Celsius Highest temperature: 29-32 degrees Celsius, some places above 32 degrees Celsius