I bought 1GB this time, and I haven't even used it all up each day. Except for remote mountainous areas across the border where there's no signal, reception is normal and smooth everywhere else.
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Vientiane Weather, Climate and Best Time to Visit
Data source:Meteostat Update date:2025-09
Vientiane year round climate
Spring (March–May): Average 83–87°F, hot climate. Temperatures gradually increase starting in March, and rainfall also begins to increase. Common activities: Visiting temples, exploring city attractions. Recommended clothing: Light and breathable clothing, short sleeves, loose-fitting long pants, sun hat.
Summer (June–August): Average 82–83°F, hot and humid climate with abundant rainfall. Afternoon thunderstorms are frequent. Common activities: Relaxing by the Mekong River, enjoying indoor activities such as visiting museums. Recommended clothing: Light and breathable clothing, short sleeves, loose-fitting long pants, rain gear.
Autumn (September–November): Average 80–82°F, warm and comfortable climate. September has the most rainfall, which gradually decreases afterwards. Common activities: Outdoor activities, sightseeing. Recommended clothing: Comfortable and breathable clothing, a light jacket or shawl for backup.
Winter (December–February): Average 74–77°F, relatively cool and dry climate. This is the driest season of the year. Common activities: Visiting temples, exploring city attractions. Recommended clothing: Long-sleeved shirts, light jacket.
Vientiane climatological average
Annual average temperature: approx. 81.3°F / Annual rainfall: approx. 1862 mm / Summer humidity: 75%–85% / Rainiest month: September
Vientiane monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
74.7°F
17
February
77.7°F
40.7
March
83.3°F
65
April
87.3°F
44.3
May
85.1°F
163.7
June
83.5°F
251.7
July
83.3°F
377.3
August
82°F
408
September
81.7°F
427.7
October
82.4°F
60.3
November
80.4°F
6.3
December
75.2°F
0
Vientiane weather for the next seven days
6/17
Wednesday
Moderate rain
79.9°F/76°F
6/18
Thursday
Moderate rain
77.7°F/74.3°F
6/19
Friday
Moderate rain
77.6°F/73.2°F
6/20
Saturday
Patchy rain nearby
88°F/72.7°F
6/21
Sunday
Sunny
91.3°F/72.5°F
6/22
Monday
Patchy rain nearby
93.4°F/74.8°F
6/23
Tuesday
Sunny
94.4°F/76.3°F
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