Historical data suggests significant rain risk (75%) on May 25. If you seek sun, consider a different date. Bring rain gear! You'll enjoy Vientiane with reasonable crowd levels and competitive accommodation options.
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Essential Travel Info for Vientiane
Currency
LAK
₭ Lao kip
Language
Lao
Driving
Right side
Connect
Most hotels, restaurants, cafes, bars et...
Safety
High Safety
GPI: 1.809
Vientiane Weather Forecast for May 25
"Rainy & Overcast. Expect average highs of 31.2°C. 75% chance of rain."
What to Wear in Vientiane in May
Based on historical data for May 25, Vientiane typically experiences temperatures between 24.6°C and 31.2°C. We recommend packing t-shirt, light clothing, umbrella to stay comfortable. With a 75% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Vientiane
Smart Suitcase
- T-Shirt
- Light Clothing
- Umbrella
Average High
31.2°C
Daytime Peak
Average Low
24.6°C
Nighttime Low
Feels Like
42.3°C
🔥 Heat index effect
Rain Chance
75%
Avg 8.2mm if it rains
Cloud Cover
87%
Moderate rain
Pressure
1006.7 hPa
Low volatility
Vientiane Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 96% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 18:00
Type I-II
🔴 19 min to burn
Type III-IV
🟡 29 min to burn
Type V-VI
🟢 48 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
27.7°C
Humid/Sticky
Heat Index
42.3°C
Feels hotter
😕 Best outdoor time:
Early morning (6-9 AM) or evening (after 6 PM)
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Laos
Flight Traffic
Moderate
59/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~32
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Vientiane
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:35
☀️ Noon
12:07
🌇 Sunset
18:40
⏱️ Daylight
13h 4m
Wind Speed
9.2 km/h
Light breeze
Sunshine
8.4 hrs
Direct Sun (Cloud-free)
Humidity
82%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Vientiane
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Vientiane
Travel Comfort Index
Real-time tourism conditions
Weather Quality
🌧️ Variable
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Mild discomfort possible for arthritic conditions.
Moderate fish activity expected.
Air quality is acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Vientiane on May 25 averages 31.2°C with a 75% precipitation probability. Wedding/Outdoor Event Score: 50/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Vientiane Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
May 18
32°C • 62% rain
Score
69
May 19
31.9°C • 65% rain
Score
59
May 21
31.9°C • 66% rain
Score
58
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (May 25) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Vientiane Worth Visiting on May 25?
Planning a trip to Vientiane on May 25? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 31.2°C with a 75% historical precipitation risk.
✈️ Travel Logistics: Approximately 32 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 10 vaccinations are recommended for Laos, including COVID-19.
📊 Historical Extremes: The hottest May 25 recorded in the last 30 years saw temperatures hit 31.8°C in 2020, while the coldest dropped to 23.4°C in 2025.