Things to Do in Vientiane in August
August weather, activities, events & insider tips
Low Season · Budget Friendly
August Weather in Vientiane
Long-run averages for August
88°F (31°C)
High Temp
77°F (25°C)
Low Temp
13.4 inches (340 mm)
Rainfall
85%
Humidity
12
Sunny-Day UV
⚠ Monsoon flooding affects low-lying roads and sections of the Mekong riverfront promenade near Fa Ngum Road. Parts may be submerged or impassable after sustained rain. Flash flooding can strand vehicles on roads outside the city centre.
⚠ Dengue fever risk increases significantly during wet season as standing water across Vientiane provides breeding habitat for Aedes mosquitoes. Use DEET-based repellent at dawn and dusk. Choose screened or air-conditioned accommodation.
⚠ Road conditions between Vientiane and outlying destinations, the mountain stretches toward Vang Vieng and Luang Prabang, can deteriorate after heavy rain with occasional mudslides and temporary closures. Check with operators on the day of travel. Allow extra time.
What's On in Vientiane in August
Vientiane in August sees average highs of 31°C and average lows of 25°C, with average rainfall of 340 mm. August is about as warm as July but wetter than July, and about as warm as September but wetter than September. Daylight decreases slightly through the month, from 12 hours 56 minutes on 1 August to 12 hours 44 minutes on 15 August.
August Climate Compared
| Month | Avg high | Avg low | Rainfall |
|---|---|---|---|
| July | 31°C | 25°C | 300 mm |
| August | 31°C | 25°C | 340 mm |
| September | 31°C | 24°C | 264 mm |
August is about as warm as July; wetter than July (340 mm vs 300 mm); about as warm as September; wetter than September (340 mm vs 264 mm).
Long-run monthly averages. Source: Wikipedia.
Daylight in August
Day length: 12 h 56 min on 1 August, 12 h 44 min on 15 August (−23 min compared with mid-July).
Computed from the city's coordinates (sunrise to sunset, standard solar geometry).
Notable Places to Visit
Places within 8 km, ordered by Wikipedia coverage. Opening hours as mapped in OpenStreetMap (fetched 2026-10-16); check before you go. Data © OpenStreetMap contributors (ODbL); descriptions from Wikidata (CC0).
Quick Answers
How much rain does Vientiane get in August?
On average 340 mm in August, wetter than September (340 mm vs 264 mm).
How warm is Vientiane in August?
Average highs are 31°C and average lows 25°C.
How long are the days in Vientiane in August?
About 12 h 44 min of daylight on 15 August.
Are there public holidays in Vientiane in August?
No public holidays fall in August in the next 12 months.
What are some notable places to visit in Vientiane?
Pha That Luang, Patuxai, Haw Phra Kaew, Wat Si Saket (from OpenStreetMap and Wikidata).
Where to Stay in Vientiane in August
Hand-picked hotels across price tiers for August travellers.
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