According to the National Center for Hydro-Meteorological Forecasting, this morning, December 13, cold air has affected some places in the northern mountainous region. The Northern region has a common temperature of 20-22 degrees Celsius, the mountainous areas 16-19 degrees Celsius.
It is forecasted that today, cold air will continue to affect other places in the Northeast region, then affect the North Central region, the Northwest region and the Central Central region. Strong Northeast wind level 3-4, coastal areas level 4-5, some places level 6, gust level 7-8.
In the Northern region, it is cold, some places are very cold; mountainous and midland areas are very cold, high mountainous areas have some places are very cold. From the night of December 13, the North Central region will turn cold. The lowest temperature in this cold air mass in the mountainous and midland areas of the North is generally from 7-10 degrees, in high mountainous areas below 5 degrees; in the Northern Delta region, it is generally from 11-14 degrees Celsius; in the North Central region, it is generally from 12-15 degrees Celsius.
Weather forecast for Hanoi on December 13 is rain, moderate rain and thunderstorms in some places, thunderstorms are likely to cause tornadoes, lightning, hail and strong gusts of wind; cold weather, some places are very cold. The lowest temperature in this cold air mass is generally 12-14 degrees Celsius.
Due to the influence of cold air, last night and this morning (December 13), there was rain in the Northern region, with some places having moderate rain.
The plains and coastal areas of the North will have moderate rain, heavy rain, locally very heavy rain and thunderstorms with common rainfall from 15-30mm, locally over 60mm. From the night of December 13, the rain will decrease.

From the afternoon of December 13 to December 14, the area from Thanh Hoa to Hue will have moderate rain, heavy rain with common rainfall from 40-70mm, locally very heavy rain over 100mm. Warning of the risk of heavy rain (>80mm/3 hours). During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
In addition, on December 13, other places in the North will have rain, locally moderate rain, heavy rain; on the night of December 13, in the Da Nang area and the East of Quang Ngai province, there will be rain, moderate rain with common rainfall from 10-20mm, locally heavy rain over 40mm.
From the night of December 14, heavy rain in the area from Thanh Hoa to Hue will tend to decrease.
People and tourists should consider their travel routes when traveling to the North and North Central regions during this time. Wear warm clothes and bring an umbrella and raincoat when going out to prevent sudden changes in weather.