When to go · September

Vietnam in September

Workable but with caveats

National Day parades cause central Hanoi road closures; Ba Dinh Square becomes especially busy.

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Daytime high

31°C

88°F

Overnight low

24°C

75°F

Rainfall

265 mm

wet

Crowd levels

medium

manageable

Prices

medium

shoulder

What to expect in Vietnam in September

September brings hot weather to Vietnam, with daytime highs around 31°C (88°F) and overnight lows near 24°C (75°F). Skies are typically distinctly rainy, with about 265 mm of rainfall on average. National Day parades cause central Hanoi road closures; Ba Dinh Square becomes especially busy..

Crowds are manageable in September — busy in popular areas but not overwhelming. Prices sit in the shoulder-season range — not the cheapest, but well off peak. Peak season runs December–February, for context.

What’s happening in September

🎉
Mid-Autumn Festival (Tet Trung Thu) · SepHanoi's Old Quarter transforms with lantern-lit streets, lion dances, and mooncake stalls along Hang Ma. Originally a children's festival, it now draws crowds of all ages watching traditional performances and buying handmade star-shaped lanterns.

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