According to the National Center for Hydro-Meteorological Forecasting, as we move into October, cold air masses begin to intensify, frequently sweeping into our country. The northern region is expected to experience approximately 3–4 cold air incursions, primarily of mild to moderate intensity. Evenings and early mornings will bring a noticeable chill.
Meteorological agencies indicate that these early-season cold spells are not yet strong enough to cause severe cold, but they will shift the northern weather from hot and humid to cooler and more pleasant conditions.
During the day, temperatures in the northern plains will range between 28–31°C, occasionally reaching up to 33°C. At night and in the early morning, temperatures will drop to 21–24°C, with a cool breeze. In mountainous areas, temperatures may fall below 18°C when cold air intensifies.
Dr. Hoàng Đức Cường, Deputy Director of the Department of Hydro-Meteorology under the Ministry of Agriculture and Environment, stated on TTXVN that by October 2025, cold air masses are expected to increase in both intensity and frequency. Cold air activity is likely to strengthen in November and December 2025, with severe cold spells in the northern region potentially occurring from the latter half of December, consistent with long-term averages.

Weather forecasts indicate that while cold air masses will frequently move into the country in October, their intensity will remain moderate.
Today’s Weather Forecast for Regions Across the Country
In the northern region, scattered showers are expected this morning (October 9th). From midday onward, sunny skies will prevail, with slightly warm temperatures. Highs in urban areas will range from 31–32°C.
Central Vietnam will experience alternating sunshine and rain today, with warm and humid conditions. High temperatures in urban areas will range from 31–33°C.
The Central Highlands and Southern Vietnam will continue to see scattered thunderstorms in the afternoon and evening. Heavy rainfall in some areas may lead to localized flooding. Thunderstorms may also bring lightning and strong gusts.
Today’s Weather in Hanoi
Hanoi’s forecast for today: Cloudy with sunny spells during the day and no rain at night. Light winds. Lows will range from 23–25°C, with highs reaching 31–33°C.
Today’s Weather Forecast for Regions Across the Country
Northwest Vietnam: Cloudy with sunny spells during the day and scattered showers and thunderstorms at night. Light winds. Lows will range from 22–25°C, with some areas below 21°C. Highs will reach 30–33°C, with some areas exceeding 33°C.
Northeast Vietnam: Cloudy with sunny spells during the day and scattered showers at night. Light winds. Lows will range from 22–25°C, with mountainous areas dropping below 22°C. Highs will reach 30–33°C, with some areas exceeding 33°C.
Thanh Hóa to Thừa Thiên Huế: The northern part will be cloudy with scattered showers and thunderstorms; the southern part (Quảng Trị to Huế) will be mostly cloudy with rain, moderate showers, and scattered thunderstorms, with some areas experiencing heavy to very heavy rain. Light winds. Thunderstorms may bring whirlwinds, lightning, and strong gusts. Lows will range from 23–26°C, with highs reaching 29–32°C.
South Central Coast: Mostly cloudy with rain, moderate showers, and scattered thunderstorms, with some areas experiencing heavy to very heavy rain. Northeast to easterly winds at level 2–3. Thunderstorms may bring whirlwinds, lightning, and strong gusts. Lows will range from 23–26°C, with highs reaching 28–31°C.
Central Highlands: Cloudy with scattered showers and thunderstorms, particularly in the afternoon and evening, with some areas experiencing heavy rain. Light winds. Thunderstorms may bring whirlwinds, lightning, and strong gusts. Lows will range from 19–22°C, with highs reaching 28–31°C.
Southern Vietnam: Mostly cloudy with rain, moderate showers, and scattered thunderstorms, with some areas experiencing heavy to very heavy rain (rainfall concentrated in the afternoon and evening). Westerly to southwesterly winds at level 2–3. Thunderstorms may bring whirlwinds, lightning, and strong gusts. Lows will range from 23–26°C, with highs reaching 29–32°C.
Ho Chi Minh City: Mostly cloudy with rain, moderate showers, and scattered thunderstorms, with some areas experiencing heavy to very heavy rain (rainfall concentrated in the afternoon and evening). Westerly to southwesterly winds at level 2–3. Thunderstorms may bring whirlwinds, lightning, and strong gusts. Lows will range from 23–25°C, with highs reaching 30–32°C.
Additional Video:
October 9–10 Weather: Northern Vietnam will be sunny during the day, with rain at night and in the morning (PLO)
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