According to the latest weather forecast from the National Center for Hydro-Meteorological Forecasting, cold air is currently approaching the northern border of our country.
From October 20, the cold air will strengthen, expanding to affect the North Central region, then spreading to the Northwest and Central Central regions.
From the night of October 20, the weather in the North and Thanh Hoa will be cold at night and in the morning, and the mountainous areas will be cold.
The wind will shift to the Northeast at level 2-3, and the coastal areas at level 3-4.
The lowest temperature in this cold air mass is in the plains, Thanh Hoa, about 19-21°C.
Midland, mountainous areas around 17-19°C.
The coldest mountainous areas below 16°C.
Hanoi weather has showers and thunderstorms in some places; from the night of October 20 and the morning it is cold, the temperature is 19-21°C.
Due to the impact of cold air combined with the circulation of storm No. 12 Fengshen, the North East Sea area has strong Northeast winds of level 6, gusting to 7-8, rough seas.
On the night of October 19 to 20, the weather forecast for the Northeast is that the temperature will be around 21-24°C, in high mountainous areas below 20°C; average 25-27°C, in mountainous areas below 25°C.
On the night of October 20 to 21, the Northeast and Thanh Hoa will have the coldest temperature of 19-21°C, high mountainous areas below 18°C; average 23-25°C, mountainous areas below 21°C.

Storm No. 12 Fengshen has entered the eastern sea area of the North East Sea, becoming the 12th storm of 2025.
It is forecasted that by October 20, storm No. 12 will move northwest at 20-25 km/h, in the North East Sea, about 380 km from Hoang Sa to the East Northeast; strong at level 10, gusting to level 12.
Cold air combined with high-altitude easterly wind disturbances will cause moderate to heavy rain, some places will have very heavy rain in the area from Nghe An to Quang Ngai on the night of October; from October 20, there will continue to be rain, moderate rain and thunderstorms, locally heavy rain.
People and tourists should be on guard against heavy rain accompanied by the risk of flooding in low-lying areas, flash floods, landslides in mountainous areas; in urban areas and industrial parks, there may be local flooding.
The cold weather at night and in the morning can affect people's health, especially the elderly and children.

Weather forecast for tomorrow, October 20th nationwide:
City. Hanoi
Lowest temperature: 23-25 degrees Celsius Highest temperature: 28-30 degrees Celsius Cloudy, showers and thunderstorms in the evening and at night; sunny during the day.
Northeast wind level 2-3.
Northwest
Lowest temperature: 20-23 degrees Celsius, some places below 20 degrees Celsius Highest temperature: 28-31 degrees Celsius Cloudy, scattered showers; sunny in the afternoon.
Light wind.
Northeast
Lowest temperature: 21-24 degrees Celsius, mountainous areas below 20 degrees Celsius Highest temperature: 28-31 degrees Celsius Cloudy, scattered showers and thunderstorms; sunny in the afternoon.
Northeast wind level 2-3, especially in coastal areas in the late afternoon and evening, gradually increasing to level 3-4.During thunderstorms, there is a possibility of tornadoes, lightning and strong gusts of wind.
Thanh Hoa to Hue
Lowest temperature: 22-25 degrees Celsius Highest temperature: 28-31 degrees Celsius Cloudy, moderate rain, heavy rain and scattered thunderstorms at night, locally very heavy rain; during the day there will be rain, moderate rain, locally heavy rain and thunderstorms.
North to northwest wind level 2-3.During thunderstorms, there is a possibility of tornadoes, lightning and strong gusts of wind.
South Central Coast
Lowest temperature: 23-26 degrees Celsius Highest temperature: North 29-31 degrees Celsius; South 30-33 degrees Celsius North (Da Nang - Quang Ngai) cloudy, moderate rain, heavy rain and thunderstorms at night, locally very heavy rain, day there is rain, moderate rain, locally heavy rain and thunderstorms; South cloudy, scattered showers and thunderstorms, especially tonight and tomorrow afternoon.
Northeast wind level 2-3.During thunderstorms, there is a possibility of tornadoes, lightning and strong gusts of wind.
Central Highlands
Lowest temperature: 19-22 degrees Celsius Highest temperature: 27-30 degrees Celsius Cloudy, scattered 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.
Southern region
Lowest temperature: 24-27 degrees Celsius Highest temperature: 31-34 degrees Celsius Cloudy, scattered 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.
Ho Chi Minh City
Lowest temperature: 24-26 degrees Celsius Highest temperature: 32-34 degrees Celsius Cloudy, scattered 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.
