# Weather transition in Vietnam

> Live situation record from CLSTR: https://clstr.news/situations/weather-transition-in-vietnam
> Updated: 2026-10-02T08:34:30.000Z. Sources: 30. Developments: 2.

Vietnam continues to experience a significant weather transition as a strong cold air mass moves through the country, bringing cooler temperatures and heavy precipitation. In Northern Vietnam, including Hanoi, temperatures are dropping, with high mountainous regions potentially reaching between 14 and 17 degrees Celsius.

Central Vietnam is facing intense rainfall, particularly from Quang Tri to Da Nang and eastern Quang Ngai. Forecasts indicate precipitation amounts between 50 and 100mm, though some local areas may exceed 200mm. This period of heavy rain is expected to persist until approximately October 10 or 11. Consequently, the National Steering Committee for Civil Defense has instructed five central provinces to prepare for potential flooding, landslides, and flash floods.

In the south, Ho Chi Minh City is under warnings for moderate to heavy rain, with some areas potentially receiving over 150mm. Across various mountainous regions, there is an increased risk of flash floods and landslides due to saturated soil levels.

Maritime conditions remain hazardous. Strong northeast winds are expected in the Gulf of Tonkin and the northern East Sea, with gusts potentially reaching levels 8 to 9.

## Claims

- A cold air mass is moving south and will affect Northeast Vietnam starting the evening of October 4. (corroborated by 16 sources)
- Northern Vietnam will experience rain, moderate rain, and thunderstorms from October 4 to the morning of October 5. (corroborated by 16 sources)
- Extreme weather risks include whirlwinds, lightning, hail, and strong wind gusts. (corroborated by 15 sources)
- The cold air mass will spread to other parts of Northern Vietnam and the region from Thanh Hoa to Hue. (corroborated by 14 sources)
- Minimum temperatures in Northern Vietnam and Thanh Hoa will range from 19–22 degrees Celsius, with high mountains reaching 14–17 degrees Celsius. (corroborated by 12 sources)
- In the Gulf of Tonkin, winds will reach levels 6-7, with gusts of level 8-9, and waves between 2-3 meters starting the morning of October 5. (corroborated by 11 sources)
- Heavy rain is expected from Quang Tri to Da Nang and eastern Quang Ngai, with common rainfall between 50-100mm and local areas exceeding 200mm. (corroborated by 9 sources)
- A cold air mass is affecting the Northeast and areas from Thanh Hoa to Hue. (corroborated by 6 sources)

## Timeline

### 2026-10-02: Vietnam weather: Cold air mass brings heavy rain and flood risks

A cold air mass is bringing heavy rain and temperature drops across Vietnam. Central provinces face flood and landslide risks, while Northern mountainous areas see significant cooling.

29 sources. https://clstr.news/cluster/northern-vietnam-weather-alert-cold-air-mass-to-bring-heavy-rain-and-temperature-drop

### 2026-09-30: Vietnam weather: Cold air mass to end heatwaves and bring rain

Vietnam faces a weather shift as a cold air mass arrives around October 4, ending heatwaves in the North and bringing rain, potential landslides in Tuyen Quang, and cooler temperatures.

15 sources. https://clstr.news/cluster/hai-phong-and-phu-tho-record-highest-temperatures-in-vietnam

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Cite as: Weather transition in Vietnam. CLSTR, https://clstr.news/situations/weather-transition-in-vietnam