The cold air mass affecting the day and night of October 13 was weak in intensity, so it did not cause significant fluctuations in temperature. The reporter had an interview with Mr. Nguyen Van Huong - Head of Weather Forecast Department, National Center for Hydro-Meteorological Forecasting on the impact of the upcoming cold air mass.
Northern mountainous areas are cold at night and in the morning below 20 degrees Celsius
Mr. Nguyen Van Huong, how will the upcoming cold air cause a drop in temperature in the North?
- Around the morning of October 19, cold air will affect the Northeast region. Then, from October 20 to October 22, the cold air will continuously be strengthened, affecting the North Central region, then affecting some places in the Northwest and Central Central regions.

Under the impact of cold air, we believe that from October 20 onwards, the northern provinces will have a clear cooling down.
The temperature in the Northern Delta region at night and in the morning is likely to drop to about 20 - 21 degrees Celsius, meaning the weather will turn cold at night and in the morning. In the northern mountainous areas, the temperature is likely to drop below 20 degrees Celsius, possibly turning cold at night and in the morning.
Thus, the weather will mainly turn cold at night and in the morning. So what is the temperature during the day, are the temperature between day and night in the North much different, sir?
- Northeast region, on the night of October 18 and the morning of October 19, there will be scattered showers and thunderstorms in some places.
From October 20, we have determined that there will still be sunshine during the day, so the temperature during the day will be around 27 - 28 degrees Celsius. The cold and frost only occur at night and in the morning, and during the day it will be a dry sunshine.
Ha Tinh to Quang Ngai is the focus of heavy rain
So how does cold air affect the weather in the Central region?
- Heavy rain in the Central region due to cold air is a relatively typical situation. According to our assessment, due to the influence of cold air combined with disturbances in the upper easterly wind zone, on the day and night of October 19, in the area from Ha Tinh to Quang Ngai, there will be moderate rain, heavy rain and thunderstorms, locally very heavy rain.
From October 23 to 26, due to the impact of the post-storm circulation No. 12 combined with the impact of cold air, the area from Ha Tinh to Quang Ngai will continue to be the focus of a period of moderate to heavy rain over a wide area.
Sir, what warnings are there about the risks of dangerous natural disasters when the combination of cold air and storms together affects in the coming days?
- The cold air will also cause strong winds and rain in the central coastal areas.
As analyzed, cold air and storm circulation cause heavy rain in the Central region, so we also warn of the possibility of urban flooding in the Central region, the risk of flash floods and landslides in the area from Ha Tinh to Quang Ngai in the coming time will also increase.
Sincerely thank you!