Peak in April
Coolest in December
Heavy in August
Peak in dry season
Vientiane Monthly Weather Guide
Click any month to explore daily weather forecasts
January
February
March
April
May
June
July
August
September
October
November
December
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
Best Time to Visit Vientiane
Location, climate overview & historical trends
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📍 17.9757° N, 102.6331° E
Open in Google MapsVientiane is a prominent destination in Laos.
Located at 17.98°N latitude,Vientiane experiences a tropical climate with warm temperatures year-round.
Based on 30 years of data, April is the warmest month (avg. 34°C), while December is the coolest. August sees the most rain (82% chance), making December the driest month.
Historical Climate Trend
30-Year Analysis+0.97°C
Total over 30 years
+0.32°C
Per decade
Linear regression analysis of historical maximum temperatures for Vientiane, based on 1995-2024 satellite data from NASA POWER.
Best Time to Visit
NASA POWER Data (1991-2021)January, February, October
Best months to visit
30°C
Avg High
Based on 30 years of NASA satellite data,Vientiane receives approximately 1,550mm of rainfall annually. These months offer optimal temperatures and minimal rain probability for your visit.
Climate Trends
EXCLUSIVE1995-2040 Temperature Trend
1995 Avg
29.8°
2024 Avg
30.6°
2040 Proj
31.1°
+0.32°C
per decade (observed)
+0.31°C
per decade (CMIP6)
🌡️ Vientiane has warmed by +1.0°C since 1995. By 2040, an additional +0.5°C is projected (based on CMIP6 rate of 0.313°C/decade), for a total of +1.5°C from 1995 baseline.
NASA POWER (1995-2024) + CMIP6 (CMCC_CM2_VHR4, EC_Earth3P_HR, FGOALS_f3_H, HiRAM_SIT_HR, MRI_AGCM3_2_S, NICAM16_8S)
Travel Intelligence
Exclusive flight analytics & health data for Vientiane
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Flight Connectivity Analysis
Airport traffic data & seasonal patterns
Quieter airport
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Peak
Dec
Low
Jun
Monthly Traffic Distribution
Key Connections
Health & Safety Advisory
CDC travel health recommendations
COVID-19
All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.
Chikungunya
All travelers should take steps to prevent mosquito bites. Chikungunya vaccination is generally not recommended. Travelers who wish to consider vaccination can visit “What to consider before traveling” on thechikungunya vaccinespage to learn more.
Hepatitis A
Recommended for unvaccinated travelers one year old or older going to Laos.Infants 6 to 11 months old should also be vaccinated against Hepatitis A. The dose does not count toward the routine 2-dose series.Travelers allergic to a vaccine component should receive a single dose of immune globulin, which provides effective protection for up to 2 months depending on dosage given.Unvaccinated travelers who are over 40 years old, are immunocompromised, or have chronic medical conditions planning to depart to a risk area in less than 2 weeks should get the initial dose of vaccine and at the same appointment receive immune globulin.
Hepatitis B
Recommended for unvaccinated travelers younger than 60 years old traveling to Laos. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Laos.
Japanese Encephalitis
Recommended for travelers whoAre moving to an area with Japanese encephalitis to liveSpend long periods of time, such as a month or more, in areas with Japanese encephalitisFrequently travel to areas with Japanese encephalitisConsider vaccination for travelersSpending less than a month in areas with Japanese encephalitis but will be doing activities that increase risk of infection, such as visiting rural areas, hiking or camping, or staying in places without air conditioning, screens, or bed netsGoing to areas with Japanese encephalitis who are uncertain of their activities or how long they will be thereNot recommended for travelers planning short-term travel to urban areas or travel to areas with no clear Japanese encephalitis season.
Malaria
CDC recommends that travelers going to certain areas of Laos take prescription medicine to prevent malaria. Depending on the medicine you take, you will need to start taking this medicine multiple days before your trip, as well as during and after your trip. Talk to your doctor about which malaria medication you should take.Transmission areasPresent in the southern part of the country in the provinces of Attapeu, Champasak, Khammouane, Salavan, Savannakhet, and SekongRare cases in the northern part of the countryNone in the cities of Luang Prabang and Vientiane (the capital)Drug resistanceChloroquine and mefloquineSpeciesP. vivax(55%)P. falciparum(45%)P. knowlesi,6P. malariae,andP. ovale(rare)Recommended chemoprophylaxisIn the provinces of Attapeu, Champasak, Khammouane, Salavan, Savannakhet, and Sekong: Atovaquone-proguanil, doxycycline, tafenoquine2Northern part of the country: No chemoprophylaxis recommended (insect bite precautions and mosquito avoidance only)4Updated April 23, 2025See footnotes
+4 more
Source: CDC Travelers' Health
View Complete Health GuideVientiane Climate Data by Month
Historical temperature and precipitation averages
| Month | Avg High (°C) | Rain Probability (%) | Status |
|---|---|---|---|
| January | 27°C | 3% | ✨ Perfect |
| February | 30°C | 4% | 😊 Pleasant |
| March | 32°C | 13% | 🔥 Hot |
| April | 34°C | 23% | 🔥 Hot |
| May | 32°C | 60% | 🌧️ Rainy |
| June | 31°C | 74% | 🌧️ Rainy |
| July | 30°C | 80% | 🌧️ Rainy |
| August | 30°C | 82% | 🌧️ Rainy |
| September | 30°C | 77% | 🌧️ Rainy |
| October | 30°C | 33% | 😊 Pleasant |
| November | 29°C | 7% | 😊 Pleasant |
| December | 27°C | 2% | ✨ Perfect |
Weather in Cities Near Vientiane
Explore climate data for popular destinations within easy reach
Luang Prabang
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Thailand
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Vietnam
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Compare weather conditions with nearby destinations for your trip planning
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Vientiane Weather FAQ
When is the best time to visit Vientiane?
Honestly, look for months with mild temperatures (20°C-25°C) and low rain chance. Based on historical data, January, February, October are usually great choices.
When is the hottest month in Vientiane?
April is historically the hottest month in Vientiane with average highs of 34°C.
When does it rain the most in Vientiane?
August typically sees the highest probability of rain (82%).
Is Vientiane expensive?
Prices vary by season. The "Perfect" weather months usually coincide with peak tourist season and higher prices, while the rainy or cold months offer better deals.