Vietnam Hanoi Weather in August — Climate Guide
August in Hanoi is moderate
August is moderate for Hanoi.
August is Hanoi's WETTEST month — 320mm rainfall over 17 rainy days. Daily afternoon thunderstorms reliable, plus occasional 3-5 day rain stretches and Vietnamese typhoon spillovers from coastal areas. Halong Bay cancellation rate climbs to 30-40%. Phang-Nga-Bay-equivalent (Cat Ba Island, more sheltered) holds up better.
Despite the rain, Hanoi stays busy: Korean summer break peak (mid-August 2-3 week window) drives major Korean tourist surge, European summer holidays continue, Vietnamese domestic travel from coastal cities seeking cooler northern Vietnam. Sofitel Metropole + Capella + La Siesta Premium book up.
Travel score
Wettest month + Korean summer break + typhoon risk
August Weather at a Glance
August averages 90°F / 32°C highs and 79°F / 26°C lows with 17 rainy days and 320mm rainfall — wettest month of the year. Humidity 85%. UV 9. Sunshine 6 hours. Frequent 3-5 day rain stretches + typhoon spillover risk.
August Travel Advice
Korean summer break (mid-August 2-3 week window) drives regional hotel + flight surge — book 4-6 weeks ahead from Seoul. Travel insurance with cancellation coverage absolutely essential — Halong cancellation 30-40%. Luxury hotel all-inclusive stays = best August strategy. Typhoon forecasts check before booking.
Flying In from Overseas
Korean summer break + Japan summer holidays drive Asia inbound spike. European peak continues. Direct flights from Seoul $400-700 (Korean break peak), Tokyo $400-600, London $700-1000, Frankfurt $650-950. Korean families head to luxury Tay Ho hotels.
August Pricing Trends
Korean break + European peak pricing: Old Quarter 3-star $60-110/night, Sofitel Metropole $450-700, Capella $450-700. Halong Bay overnight cruise $160-320 when running. Flights from Seoul $500-750 Korean break week.
Hanoi August Weather Stats
Avg High
32°C
Avg Low
26°C
Rainy Days
17
320mm total
Sunshine
6h
Daily avg
Humidity
85%
high
UV Index
9
Very high
Wind
10 km/h
Gusts 25
Sea Temp
0°C
no swimming
Crowds
Busy
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
35 μg/m³
PM10
55 μg/m³
Status
moderate
Feels-Like Temperature & Wind
Feels like
Daytime
36°C
Nighttime
27°C
Humidity and wind affect how the actual temperature feels.
Wind
10 km/h
Max gust 25 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Korean summer break overlap (mid-August)
- Lush green Hanoi peak
- Luxury hotel value remains (-30-40%)
- August Revolution holiday atmospheric
Cons
- WETTEST month (320mm + 17 rainy days)
- Halong Bay 30-40% cancellation rate
- Typhoon spillover risk
- Mosquito peak
August Events & Festivals
- European summer holidays peak
- Korean summer break peak (mid-August 2-3 week window)
- Vietnamese August Revolution (August 19)
- Wettest month of year (320mm)
Hanoi in August — Full Picture
August is Hanoi's WETTEST month — 320mm rainfall over 17 rainy days. Daily afternoon thunderstorms reliable, plus occasional 3-5 day rain stretches and Vietnamese typhoon spillovers from coastal areas. Halong Bay cancellation rate climbs to 30-40%. Phang-Nga-Bay-equivalent (Cat Ba Island, more sheltered) holds up better.
Despite the rain, Hanoi stays busy: Korean summer break peak (mid-August 2-3 week window) drives major Korean tourist surge, European summer holidays continue, Vietnamese domestic travel from coastal cities seeking cooler northern Vietnam. Sofitel Metropole + Capella + La Siesta Premium book up.
For honeymooners specifically: an all-inclusive Capella by Bensley stay where you mostly stay on property with the spa + restaurants is actually a workable August choice — 30-40% off peak pricing and the rain affects less. For active travelers wanting Halong + Sapa: skip August.
What to Wear & What to Pack
Same as July. Wettest month — fully waterproof gear + waterproof phone case + multiple clothing changes. Mosquito repellent mandatory.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
27.7°C
21°C
13/mo
Summer (Jun·Jul·Aug)
Current32.7°C
26°C
15.7/mo
Autumn (Sep·Oct·Nov)
28.3°C
21.7°C
9.7/mo
Winter (Dec·Jan·Feb)
20°C
14.7°C
7.3/mo
Hanoi Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 19° | 14° | 7d·25mm | 3h | 80% | 4 | Moderate | Shoulder | |
| 20° | 15° | 9d·30mm | 2h | 82% | 4 | Moderate | Peak | |
| 23° | 18° | 13d·45mm | 2h | 85% | 5 | Moderate | Shoulder | |
| 28° | 21° | 11d·90mm | 4h | 84% | 7 | Busy | Shoulder | |
| 32° | 24° | 15d·190mm | 6h | 84% | 10 | Moderate | Shoulder | |
| 33° | 26° | 14d·240mm | 6h | 83% | 10 | Moderate | Low season | |
| 33° | 26° | 16d·270mm | 6h | 84% | 10 | Busy | Shoulder | |
| 32° | 26° | 17d·320mm | 6h | 85% | 9 | Busy | Shoulder | |
| 31° | 24° | 14d·250mm | 6h | 84% | 9 | Moderate | Shoulder | |
| October (Best) | 29° | 22° | 9d·100mm | 5h | 80% | 7 | Very busy | Peak |
| November (Best) | 25° | 19° | 6d·50mm | 5h | 75% | 6 | Very busy | Peak |
| December (Best) | 21° | 15° | 6d·25mm | 4h | 75% | 5 | Very busy | Peak |
View Other Months
Hanoi August Hotel Picks
Frequently Asked Questions
Is August a good time to visit Hanoi?
Hanoi in August is moderate. Tourist crowds are busy and flight/hotel prices are shoulder.
What's the average temperature in Hanoi in August?
Hanoi August averages a high of 32°C and a low of 26°C.
Does it rain much in Hanoi in August?
Hanoi August averages 320mm of rainfall over about 17 rainy days.
What should I wear in Hanoi in August?
Same as July. Wettest month — fully waterproof gear + waterproof phone case + multiple clothing changes. Mosquito repellent mandatory.
What time are sunrise and sunset in Hanoi in August?
Hanoi August sunrise is 05:40 and sunset is 18:30, with 12h 50min of daylight.
What's the air quality like in Hanoi in August?
Hanoi August air quality (AQI) averages 80, rated Moderate. PM2.5 averages 35μg/m³.
What activities are recommended in Hanoi in August?
In August, Hanoi is great for Indoor museums all day, Luxury hotel stays + spa, Pho heritage shops.
Is August peak season in Hanoi?
Hanoi August crowds are busy and prices are shoulder. Advance reservations are strongly recommended.
Best Months to Visit Hanoi
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.