Weather in Vietnam in October

October climate overview

Daytime highs across Vietnam in October run from 28.1°C (Phu Quoc) to 30.1°C (Ho Chi Minh City). In Ho Chi Minh City about 100% of October days reach 25°C. Nights average 23.6°C; the coldest 10% of nights in Phu Quoc fall to 24°C or below.

Rainfall in October

Expect around 22 rainy days (1 mm or more) in October, with Hanoi the driest (12 days) and Phu Quoc the wettest (27 days). The wettest October at Ho Chi Minh City between 1991 and 2020 was 2016 with 412 mm; the driest was 2004 with 137 mm.

Sea temperature

The sea averages 29.1°C around Vietnam in October. That is comfortable for swimming.

Sunshine and daylight

Around 3.0 hours of sunshine a day on average, out of 11.8 hours of daylight (sunshine estimated from cloud cover).

October against the rest of the year in Vietnam

October is the 8th warmest month of the twelve in Vietnam. It is 0.7°C cooler than September and 0.9°C cooler in November. The hottest month here is May (31°C) and the coolest January (26°C).

Which part of Vietnam in October?

• Most sunshine: Hanoi, 4.9 h a day.
• Driest: Hanoi, about 12 rainy days.
• Warmest sea: Phu Quoc, 29°C.
• Hottest: Ho Chi Minh City, 30°C by day.
• Coolest (better for walking and cities): Phu Quoc, 28°C.

What to pack for Vietnam in October

Based on the averages: summer clothes for the day; a rain jacket - roughly 22 wet days; swimwear - the sea is 29°C.

Similar weather elsewhere in October

Within 1.5°C of Vietnam's October daytime average: Montego Bay (30°C, sea 29°C), Kololi (30°C, sea 29°C), Hurghada (30°C, sea 27°C), Goa (30°C, sea 28°C), Kuala Lumpur (30°C). See the full ranking for October.

Hanoi is the better choice for outdoor plans

Hanoi offers the most favourable balance here if your priority is spending time outside rather than swimming. Days average 28°C, so light clothing still makes sense, while nights at 22°C are milder than in the southern destinations. Its 12 rainy days mean you should still carry rain protection, but wet weather is less frequent than in Ho Chi Minh City or Phu Quoc. Keep outdoor plans flexible rather than assuming every day will be dry. For travellers who dislike very warm evenings and want the better chance of avoiding rain, Hanoi is the strongest October choice among these options.

Ho Chi Minh City is hot, with frequent rain

Ho Chi Minh City suits travellers who are comfortable with heat and happy to work around wet weather. It is the hottest destination listed, with daytime temperatures averaging 30°C and nights staying warm at 24°C. Rain occurs on 27 days, so waterproof protection should be part of your everyday bag rather than something left behind. That figure does not tell you how long rain lasts, so it is not a reason to write off every outdoor plan. Choose breathable clothes, take breaks from the midday heat and leave room to rearrange your day. This is not the strongest option for a mainly dry holiday.

Phu Quoc has warm water, but beach weather is less reliable

Phu Quoc's sea averages 29°C, making water temperature a plus if swimming is your priority. The catch is the 27 rainy days: warm water does not mean dependable weather for sitting outside. Daytime temperatures average 28°C, while nights remain warm at 25°C, so there is little need to pack for cold evenings. Choose it if you can accept rain interrupting beach plans, rather than if sunshine is the main requirement of your holiday. Sea temperature alone also cannot tell you if conditions are suitable for swimming; check conditions locally before entering the water. Keep alternatives in mind for wet spells.