Laos Vientiane Weather in August — Climate Guide
August in Vientiane is moderate
August is moderate for Vientiane.
WARNING: August is wetter than July — rainfall 300mm + 19 rainy days. Days 31°C / 88°F + nights 24°C / 75°F. Mekong River reaches year's roughest waters; cross-border Friendship Bridge views are muddy and unphotogenic.
Korean Liberation Day weekend (Aug 15) drives a brief regional hotel + flight peak. Outside of that window, pricing stays similar to July — boutique $50-100/night. Korean summer break tail continues.
Travel score
Monsoon wet peak + Korean summer break tail
August Weather at a Glance
August averages 88°F / 31°C highs and 75°F / 24°C lows with 19 rainy days and 300mm of rain. Humidity 83%. UV 9. Sunshine 5 hours (year's low). Sea/swim 28°C rough. Year's roughest Mekong.
August Travel Advice
Travel insurance with cancellation coverage absolutely essential. Plan city-based itinerary + indoor activities. Boun Khao Padap Din (August full moon) — Pha That Luang + Wat Si Saket candlelit ceremony at 19:00. Hotels have generators for power cuts.
Flying In from Overseas
Korean summer break tail + Japanese O-Bon week + European peak holiday. Flights via Bangkok $350-650. Korean Liberation Day (Aug 15) drives brief Korean inbound peak.
August Pricing Trends
Korean break + European peak: boutique $50-100/night, Crowne Plaza $220-500, Settha Palace $150-360. Liberation Day weekend (Aug 15) slight peak. Flights $350-650 from East Asia.
Vientiane August Weather Stats
Avg High
31°C
Avg Low
24°C
Rainy Days
19
300mm total
Sunshine
5h
Daily avg
Humidity
83%
very humid
UV Index
9
Very high
Wind
8 km/h
Gusts 20
Sea Temp
28°C
swimming Mekong rough
Crowds
Moderate
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
20 μg/m³
PM10
36 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
36°C
Nighttime
25°C
Humidity and wind affect how the actual temperature feels.
Wind
8 km/h
Max gust 20 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Liberation Day weekend brief peak then drop
- Lush green landscape
- Temple ceremonies atmospheric
Cons
- WARNING: wettest month tail-end of summer
- Mekong heavily muddy
- Power cuts heavier
August Events & Festivals
- Korean Liberation Day weekend (Aug 15) — brief regional peak
- Korean summer break tail
- WARNING: Mekong River at year's roughest
- Boun Khao Padap Din (August full moon) — ancestor memorial temple ceremonies
Vientiane in August — Full Picture
WARNING: August is wetter than July — rainfall 300mm + 19 rainy days. Days 31°C / 88°F + nights 24°C / 75°F. Mekong River reaches year's roughest waters; cross-border Friendship Bridge views are muddy and unphotogenic.
Korean Liberation Day weekend (Aug 15) drives a brief regional hotel + flight peak. Outside of that window, pricing stays similar to July — boutique $50-100/night. Korean summer break tail continues.
This is the month most outdoor-focused travelers should skip. Pool + spa + cooking class + cultural temple visits in the historic Nam Phou Square still work, but outdoor sightseeing is rough. Boun Khao Padap Din (August full moon, ancestor memorial) brings candlelit temple ceremonies if the dates align.
For travelers timing-locked to summer break: stick to honeymoon-style on-property luxury at Crowne Plaza, Settha Palace, or Pullman. For everyone else: skip August, visit November-February or May-June.
What to Wear & What to Pack
Similar to July with heavier rain. Quick-dry + rain shell + waterproof bag mandatory. Days 31°C / 88°F + nights 24°C / 75°F.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
33.7°C
23.3°C
7.3/mo
Summer (Jun·Jul·Aug)
Current31.3°C
24°C
18/mo
Autumn (Sep·Oct·Nov)
30°C
21.3°C
11/mo
Winter (Dec·Jan·Feb)
29°C
17.7°C
1/mo
Vientiane Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| January (Best) | 28° | 17° | 1d·7mm | 8.5h | 70% | 8 | Busy | Peak |
| February (Best) | 31° | 19° | 1d·15mm | 9h | 65% | 9 | Busy | Peak |
| 33° | 22° | 2d·30mm | 8.5h | 60% | 11 | Moderate | Shoulder | |
| 35° | 24° | 6d·90mm | 8h | 65% | 11 | Busy | Peak | |
| 33° | 24° | 14d·200mm | 6.5h | 75% | 10 | Moderate | Low season | |
| 32° | 24° | 16d·240mm | 6h | 80% | 10 | Quiet | Low season | |
| 31° | 24° | 19d·280mm | 5.5h | 82% | 10 | Moderate | Shoulder | |
| 31° | 24° | 19d·300mm | 5h | 83% | 9 | Moderate | Shoulder | |
| 31° | 23° | 19d·320mm | 5h | 83% | 9 | Quiet | Low season | |
| 30° | 22° | 11d·150mm | 7h | 78% | 9 | Moderate | Low season | |
| November (Best) | 29° | 19° | 3d·25mm | 8.5h | 70% | 8 | Very busy | Peak |
| December (Best) | 28° | 17° | 1d·7mm | 8.5h | 70% | 8 | Busy | Peak |
View Other Months
Vientiane August Hotel Picks
Frequently Asked Questions
Is August a good time to visit Vientiane?
Vientiane in August is moderate. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in Vientiane in August?
Vientiane August averages a high of 31°C and a low of 24°C.
Does it rain much in Vientiane in August?
Vientiane August averages 300mm of rainfall over about 19 rainy days.
What should I wear in Vientiane in August?
Similar to July with heavier rain. Quick-dry + rain shell + waterproof bag mandatory. Days 31°C / 88°F + nights 24°C / 75°F.
What time are sunrise and sunset in Vientiane in August?
Vientiane August sunrise is 05:55 and sunset is 18:20, with 12h 25min of daylight.
What's the air quality like in Vientiane in August?
Vientiane August air quality (AQI) averages 45, rated Good. PM2.5 averages 20μg/m³.
What activities are recommended in Vientiane in August?
In August, Vientiane is great for Hotel pool + spa, Lao cooking class, Boun Khao Padap Din temple ceremony.
Is August peak season in Vientiane?
Vientiane August crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit Vientiane
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.