Vientiane Weather in December

🇱🇦 Laos

27°C

High

17°C

Low

Rain Days

10h

Sunshine

78%

Humidity

Asia › 🇱🇦 Laos › Vientiane

Updated: March 2026

Is December a Good Time to Visit Vientiane?

8/10

Excellent

December is a excellent time to visit Vientiane (8/10). With 10 daily sunshine hours and only 1 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 6th sunniest of the year in Vientiane. Beach and outdoor-focused visitors will find December ideal, though hotel prices reflect demand and popular sites get crowded by mid-morning. January offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Vientiane's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. Planning tips: book accommodation at least 6-8 weeks ahead, as popular hotels fill quickly during December. Purchasing skip-the-line tickets for major attractions in advance saves meaningful time. If you have flexibility, arriving a few days before or after peak weekends reduces both crowds and prices noticeably.

vs November:29°C avg high

Based on 30-year climate normals (1991 to 2020), December in Vientiane averages 27°C by day and 17°C overnight, a range that places it firmly in the warmer tier of the annual calendar. The month records approximately 10 sunshine hours per day and 8mm of total rainfall across 1 wet days, giving it a sunshine-to-rain ratio that is decidedly favourable for outdoor travel.

27°C

Avg High

17°C

Avg Low

1 days

Rain Days

10h

Sunshine

78%

Humidity

Temperature in Vientiane in December

The 10°C day-night temperature range is typical for continental climates: a light jacket in the morning that you shed by midday and need again after sunset. At 78% humidity, the 27°C daytime high feels 2-4°C warmer in practice: quick-dry fabrics and shade-seeking between noon and 3pm are the sensible response. The UV index of 3 is low, meaning sun exposure is minimal concern and sunscreen is largely optional. Winds are calm at an average 11 km/h, so wind-chill is not a factor in planning your clothing. In Fahrenheit: 81°F average high, 63°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).

Temperature in December

Monthly Precipitation (mm)

What to Wear in Vientiane in December

Morning17°CBefore the day warms up

Afternoon27°CPeak daytime temperature

Evening20°CAfter sunset cools down

Packing for Vientiane in December means dressing for 27°C days and 17°C evenings. A light cotton tee with a casual overshirt works well at 27°C, the overshirt doubles as a layer for air-conditioned venues. Evening temperatures settle at 17°C, a modest 10°C drop that a light cardigan or denim jacket covers. Comfortable walking trainers are the versatile choice for both outdoor sightseeing and indoor venues. For temple and religious site visits, carry a lightweight scarf or sarong to cover shoulders and knees, required at most major sites across the region. At 78% average humidity, quick-dry synthetic or bamboo fabrics dry overnight and stay comfortable longer than cotton.

💡

Local tip: Temple and religious site visits require covered shoulders and knees in most of Vientiane's heritage areas. A lightweight scarf or sarong weighs almost nothing and solves the problem instantly.

Events in Vientiane in December

December has no major festivals or public holidays in Vientiane, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.

What to Pack for Vientiane in December

Based on 27°C average highs and 1 rainy days

Light layers for morning and evening
Breathable T-shirts and comfortable trousers
UV-protective sunglasses
Quick-dry travel towel
Anti-chafe balm for long walking days
Moisture-wicking synthetic fabrics for active days
SPF 30+ sunscreen
Comfortable walking shoes (a second pair lets the first air out overnight)
Universal travel adapter
Small day pack for city exploration
Reusable water bottle

Best Activities in Vientiane in December

Explore outdoor markets and street food stallsMid-morning (10am-12pm)At 27°C, the temperature is ideal for extended walking without overheating
Guided walking tour of the historic centreMorning or late afternoonComfortable temperatures allow several hours on foot without fatigue
Visit rooftop viewpoints and observation decksGolden hour (1 hour before sunset)Warm clear evenings provide exceptional visibility for panoramic photography
Day trip to the surrounding countryside or coastFull day (depart by 8am)December is reliably dry enough for rural day trips without weather risk
Afternoon in a world-class museum or galleryAfternoon (2-5pm)Pairs well with outdoor morning activities and provides a mid-day rest from sightseeing
Coffee-house or traditional cafe culture experienceMid-morning or post-lunchA cultural ritual in this region that rewards slow appreciation regardless of weather
Evening live music, theatre, or opera performanceEvening shows typically at 7-9pmConsistent evening temperatures make getting to and from evening venues comfortable
Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningDecember brings distinct seasonal changes to public green spaces worth exploring
Seek out chilled local specialities: cold-brew tea, ice desserts, or chilled seafood at street-level stallsAny time; most atmospheric in evening marketsHot-weather street food culture peaks in December, with vendors setting up specifically for warm evenings

Why is Vientiane warm in December?

In December, Vientiane sits in the dry season corridor, as the ITCZ shifts away from the region and trade winds bring drier, more stable air. This produces reliably sunny days reaching 27°C, with lower humidity than the wet months. Overnight lows of 17°C offer a pleasant reprieve from the midday heat. Climate data: Open-Meteo ERA5 (1991–2020).

Sunshine Hours

The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.

UV Index

A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate -- wear sunscreen. UV 6-7: High -- hat and SPF 30+ essential. UV 8-10: Very High -- limit midday exposure. UV 11+: Extreme -- seek shade between 10am-4pm.

Rain Days

A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.

Humidity

Relative humidity as a percentage. Below 40%: Dry -- skin and throat may feel parched. 40-60%: Comfortable -- ideal for most people. 60-80%: Sticky -- light, breathable fabrics recommended. Above 80%: Muggy -- heat feels more intense; quick-dry clothing is essential.

Frequently Asked Questions: Vientiane in December

In December, Vientiane experiences average highs of 27°C (81°F) and lows of 17°C (63°F). Expect around 1 rainy days and 10 hours of sunshine per day, with humidity averaging 78%. The 10°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV exposure is moderate at index 3.

Vientiane typically sees 1 rainy days in December, with total precipitation of around 8mm. This makes December one of the drier months of the year, and a reliable window for outdoor sightseeing and day trips. Rain showers tend to be brief when they do occur. For context, the driest month in Vientiane typically sees 4-6 fewer rain days than December.

Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Vientiane in December. Daytime temperatures of 27°C are pleasant, but the evening drop to 17°C means a jacket is essential if you plan to be out after dark. Rain is infrequent with only 1 wet days, so a light rain layer is optional. Comfortable walking shoes are a priority given the amount of ground most visitors cover.

Yes, December is an excellent time to visit Vientiane. With 10 daily sunshine hours and only 1 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 27°C during the day are comfortable for long walks and outdoor dining. This is peak travel season, so booking accommodation in advance and arriving at popular attractions early in the morning helps avoid the busiest periods.

The average high temperature in Vientiane in December is 27°C (81°F), and the average low is 17°C (63°F). The mean daily temperature is approximately 22°C (72°F). The day-to-night range of 10°C is moderate, meaning a single light jacket covers most situations. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.

The best month to visit Vientiane is generally April. April offers the most sunshine at 11 hours per day and only 11 rainy days. Average temperatures reach 34°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around April gives you the best chance of dry, bright weather.

December is shoulder or low season in Vientiane, meaning fewer tourists and generally lower prices than peak months. With 10 sunshine hours and 1 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.

In December, Vientiane suits a range of activities thanks to mild temperatures around 27°C. With few rainy days, outdoor activities are highly recommended. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 10 hours of sunshine, parks and waterfront walks are particularly enjoyable.

December ranks 6th sunniest of the year in Vientiane, with an average 10 daily sunshine hours. The driest months are December, January, and February. April is the hottest month (34°C avg high); January is the coolest (27°C). From here, temperatures fall 0°C into January. Compared to last month (November: 29°C high, 3 rain days), December is cooler and drier. December sits in the middle of the annual sunshine ranking for Vientiane, offering a reasonable balance of good weather and manageable crowds.

Year-Round Climate

Month	High	Low	Rain Days	Sun	Details
January	27°C	17°C	2	10h	View
February	30°C	19°C	2	10h	View
March	32°C	22°C	6	10h	View
April	34°C	24°C	11	11h	View
May	32°C	25°C	23	9h	View
June	30°C	25°C	26	8h	View
July	30°C	24°C	28	7h	View
August	30°C	24°C	28	7h	View
September	30°C	24°C	24	8h	View
October	29°C	23°C	11	9h	View
November	29°C	20°C	3	10h	View
December	27°C	17°C	1	10h	View

Other Months in Vientiane

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Plan Your Trip to Vientiane

Best Time to Visit Vientiane Vientiane vs Hanoi in December Vientiane vs Chiang Mai in December

Nearby Destinations with Similar Weather

These cities are within 500 km and experience broadly comparable weather conditions during the same calendar month, making them practical standalone alternatives or worthwhile additions to a longer regional itinerary.

Hanoi🇻🇳 Vietnam477 km away

21°C14°C low

Chiang Mai🇹🇭 Thailand395 km away

27°C16°C low

Luang Prabang🇱🇦 Laos219 km away

26°C16°C low

Data Sources for Vientiane

Vientiane on Wikipedia Open-Meteo Climate API NOAA National Centers UK Met Office WMO GeoNames

Climate normals represent 30-year averages (1991-2020). Individual years may vary.