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Weather & Climate in Vientiane, Laos
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Vientiane has a warm climate with an average annual temperature of 79°F (26°C). Winters average 72°F in January while summers reach 83°F in July / relatively mild seasonal variation. The area gets 222 sunny days per year, above the national average. Annual precipitation totals 63.0 inches (wetter than the 38-inch national average). The city sits at an elevation of 571 feet.
Temperature
72°F Jan (22°C)
83°F Jul (28°C)
| Annual Average | 79.4°F |
| 47% above US avg | |
| January Average | 72°F (22°C) |
| July Average | 83°F (28°C) |
| Sunny Days | 222 days/yr |
Geography
| Elevation | 571 ft (174 m) |
| Area | 1,513.5 sq mi (3,920.0 km²) |
| Population Density | 130/sq mi |
| Coordinates | 17.9667°N, 102.6000°W |
| Timezone | Asia/Vientiane |
Precipitation & Snow
Air Quality
Earthquake History
1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.
| Feb 23, 2011 | 37 km S of Sainyabuli, Laos | M4.6 | 140 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
2 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 1.
| Year | Name | Category | Max Wind | Closest |
| 2017 | Doksuri | Category 1 | — | 286 km |
| 2013 | Wutip | Category 1 | — | 243 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 72°F (22°C) | 0.2 in | |
| February | 75°F (24°C) | 0.6 in | |
| March | 80°F (27°C) | 1.4 in | |
| April | 84°F (29°C) | 3.2 in | Warmest |
| May | 84°F (29°C) | 9.0 in | |
| June | 84°F (29°C) | 10.7 in | |
| July | 83°F (28°C) | 11.0 in | |
| August | 82°F (28°C) | 12.4 in | Wettest |
| September | 82°F (28°C) | 10.4 in | |
| October | 80°F (27°C) | 3.5 in | |
| November | 76°F (24°C) | 0.6 in | |
| December | 71°F (22°C) | 0.2 in | Coldest, Driest |
Vientiane has a seasonal temperature swing of 13°F / from 71°F in December to 84°F in April. Total annual precipitation is 63.0 inches, with August being the wettest month (12.4") and December the driest (0.2").