The National Center for Hydro-Meteorological Forecasting predicts that the cold rainy weather in the North will persist until the end of November 3rd. From November 4th to 6th, the North will experience sunny weather, with daytime temperatures rising above 25 degrees Celsius.
Around November 7th and 8th, a strong northeast monsoon is expected to affect our country, bringing thunderstorms and causing widespread cold in the northern provinces as well as the northern central provinces, with average daily temperatures dropping below 20 degrees Celsius. This cold spell will be the most extensive and severe since the beginning of the year.
This cold spell will be the most extensive and severe since the beginning of the year.
“However, this will be a dry cold spell, characterized by sunny weather during the day and severe cold at night. October each year is a transitional period with erratic weather patterns of sun and rain. By the end of October and the beginning of November, the North typically experiences dry and sunny weather, with low humidity as cold air begins to dominate the region,” the National Center for Hydro-Meteorological Forecasting noted.
Explaining the prolonged cold rainy weather of recent days, the National Center for Hydro-Meteorological Forecasting stated that this cold air mass has not moved deeply into the South as usual but has shifted eastward, creating a southeast wind belt that brings moisture from the Gulf of Tonkin inland.
As a result, the North has continuously experienced rain, intermittent showers, and light rain. The combination of rain and cold air has significantly lowered temperatures in the northern provinces as well as in Thanh Hoa, Nghe An, and Ha Tinh, with average daily temperatures ranging from October 28th to today generally around 21-23 degrees Celsius in the lowlands and 19-21 degrees Celsius in the mountainous regions. It is cold in the mountains and chilly in the lowlands.
According to statistics from approximately 50 years of data, cold weather in the last days of October occurs almost every year, with some years experiencing particularly cold temperatures.
However, the continuous rainy weather lasting 3-5 days at the end of October and average daily temperatures from 20-22 degrees Celsius, like in 2021, are not common every year.
Based on data from the Ha Dong Meteorological Station from 1981 to present, the last instance of continuous rain for 3 to 5 days with average daily temperatures in the cold range occurred in October 2001, exactly 20 years ago.
Additionally, in October of the years 1985, 1986, 1988, and 1993, there were similar weather patterns with continuous rain and average daily temperatures typically ranging from 20-22 degrees Celsius; in 1988, the average daily temperature even dropped to 17-19 degrees Celsius (cold weather).
Thus, it can be preliminarily assessed that from 1990 and earlier, this type of weather occurred more frequently, but in recent years, the frequency has shown a declining trend.
