SeasonScore
Hanoi, Vietnam
Photo: Nam-ho Park · CC BY 2.0

Vietnam

Hanoi in May

🌧️ Rainy season

Hot, humid and often rainy. Watch for hazy air.

🎒 Pack: light, breathable clothes & sunscreen · compact umbrella or rain jacket · quick-dry fabrics · N95 mask for hazy days

Best months: Nov (8.3), Feb (7.8), Mar (7.5)

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Why May scores 6.8What goes into the score

How it works
🌡️ 33° / 25°C🌧️ 165 mm💧 dew pt 24°🍃 PM2.5 45
  • Weather comfort6.2
    • ✓Hot (33°C highs / 25°C lows)
    • !Very humid/sticky (dew point 24.2°C)
    • !Wet: ~165 mm rain, ~5 heavy-rain days
  • Air quality4.6
    • !Unhealthy for sensitive groups (PM2.5 ~45 µg/m³)
  • Seasonal hazards10.0
    • ·No notable seasonal hazards
  • Safety baseline7.5
    • ·Increased caution
Compare monthsPut May side by side with another month
MayNov
Score6.8 Good8.3 Very good
Season🌧️ Rainy season🌦️ Shoulder (showers)
High / low33° / 25°27° / 20°
Rain165 mm61 mm
Humiditydew pt 24°dew pt 18°
PM2.545 µg/m³37 µg/m³

Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast). Temperatures: Hanoi weather-station normals. Rainfall: downtown Hanoi weather-station normals (national met service).

Holidays & crowdsMay 2027

Long weekend

There's at least one long weekend. Domestic travel picks up and popular spots get busier over those days.

  • International Labor Day 30 Apr – 3 May · 4 days off in a row

National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).

Explore HanoiEvents, sights, food & souvenirs

Check event dates locally

Vietnam's capital, with a lakeside centre, a busy Old Quarter, French colonial buildings, ancient temples and an outstanding street food culture.

Events in May

No major events on our calendar for May.

Coming up later

National DayEvery year2 September every year

Marks Vietnam's declaration of independence in 1945, with flags and official celebrations.

Why go: A public holiday; the mausoleum area may be closed to visitors.

Where: Ba Dinh Square and citywide

Mid-Autumn FestivalDate variesLunar calendar - usually September or early October

A children's festival with lanterns, lion dances and mooncakes.

Why go: Hang Ma street is packed with lantern stalls in the weeks before.

Where: Hang Ma street and the Old Quarter

Tet (Lunar New Year)Date variesLunar calendar - late January to mid-February, date moves each year

Vietnam's biggest holiday, with flower markets, family visits and temple outings.

Why go: Many shops and restaurants close for several days; transport is heavily booked.

Where: Citywide