CaliToday (13/12/2025): A significant shift in weather patterns is sweeping across Vietnam this weekend, bringing a sharp contrast between the freezing North and the humid South, while the capital city takes drastic measures to combat worsening air quality.
Northern Vietnam: The Big Freeze Arrives
A powerful cold front (không khí lạnh) has officially descended upon Northern Vietnam, abruptly ending the mild autumn days. Residents woke up this morning to gray skies, scattered rain, and a biting chill that has permeated the region.
Plummeting Temperatures: Thermometers in the Red River Delta, including Hanoi, have dropped significantly, forcing citizens to bundle up in heavy coats and scarves. The combination of rain and wind is making the "real feel" temperature even lower.
Mountainous Extremes: The situation is far more severe in the high-altitude regions. Famous tourist destinations and remote villages in the northern mountains are bracing for harsh conditions, with temperatures forecasted to plunge below 5°C. Frost and ice are potential risks in areas like Mau Son and Sa Pa.
Health Warning: Health officials are urging the public to take precautions. The sudden drop in temperature poses a serious risk of respiratory illnesses and hypothermia, particularly for the elderly and young children. Residents are advised to limit outdoor activities early in the morning and late at night.
Hanoi’s "Code Red" on Air Quality
Adding to the gloomy weather, Hanoi is currently grappling with a severe spike in air pollution. The city is enveloped in a thick haze, reducing visibility and raising health alarms.
In an urgent response to the hazardous Air Quality Index (AQI) levels, the Hanoi municipal government has enacted emergency measures:
Construction Halt: A temporary suspension has been ordered for all new licenses regarding road and sidewalk excavation. This drastic step aims to curb the massive amount of dust (bụi mịn) generated by construction sites, which is a primary contributor to the smog.
Public Advisory: Residents are strongly encouraged to wear PM2.5 protective masks when venturing outside and to use air purifiers indoors where possible.
Central & Southern Vietnam: A Stark Contrast
While the North shivers, the rest of the country is experiencing a mix of tropical volatility.
Central Region: The cold front's influence is clashing with local humidity, triggering scattered thunderstorms across the Central provinces. Travelers should be prepared for sudden downpours.
Ho Chi Minh City & The South: Down south, the weather remains typically tropical. Days are currently marked by mild humidity and heat, making for muggy conditions. However, the pattern is unpredictable, with a high chance of evening showers providing some relief from the daytime warmth.