According to the National Center for Hydro-Meteorological Forecasting, currently, in the north, a cold air mass is moving south. In the North, there is rain in some places, the common temperature is 17 - 20 degrees C.
Around January 5, 2026, this cold air mass will affect the Northeast region of the North, then affect other places in the Northeast, North Central, Northwest and Central Central regions. On land, northeast wind is strong at level 2-3, coastal areas level 3-4. From the night of January 4 to January 5, 2026, there will be rain and scattered light rain in the North.
The Northern and North Central regions continue to be cold, especially the mountainous and midland areas of the Northern region are very cold, with harmful cold in some places. Mountainous areas of the Northern provinces need to be wary of frost and frost.
Day and night January 5, 2026, the Northern region has the lowest temperature commonly 13 - 16 degrees C, mountainous areas 10 - 13 degrees C, high mountainous areas in some places below 9 degrees C. The average temperature commonly 17 - 19 degrees C, mountainous areas in some places 13 - 15 degrees C.
The lowest temperature in this cold air wave in the Northern region, Thanh Hoa and Nghe An is commonly from 10 - 13 degrees Celsius, the Northern mountainous region from 7 - 10 degrees Celsius, and the high mountainous region in some places below 5 degrees Celsius.
Severe cold, severe cold, frost and frost are likely to affect livestock and poultry, and at the same time affect the growth and development of crops.
Hanoi area on the night of January 4 to January 5, 2026 has rain and scattered light rain, the weather continues to be cold. The lowest temperature in this cold air wave is commonly from 10 - 13 degrees C.
The area from Ha Tinh to Da Nang city and the eastern provinces from Quang Ngai to Gia Lai from January 5th will have rain, showers, locally moderate rain, heavy rain and thunderstorms due to the influence of cold air. In thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
Localized heavy rain is likely to cause flooding in low-lying areas; flash floods on small rivers and streams; landslides on slopes; heavy rain in a short time causes flooding in urban areas and industrial parks.
