Xam Nua in Winter
In winter (December, January and February), Xam Nua sees average daytime highs around 21°C and overnight lows near 11°C, with 59 mm of rain over about 12 wet days across the season. It is the coldest season of the year and the driest season of the year.
Over the season highs climb from about 20°C in early December to 24°C by late February. The sky is clear or mostly clear about 37% of the time across winter, and the air most often feels dry.
Winter is Xam Nua's best season of the year to visit on our travel score. For the whole year in context, see Xam Nua's year-round climate.
- Avg daytime high
- 21°C
- coldest season of the year
- Avg overnight low
- 11°C
- Rainfall
- 59 mm
- 12 wet days
- Avg wind
- 6 km/h
- Travel score
- 7.3
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Xam Nua in Winter
Over the season highs climb from about 20°C in early December to 24°C by late February.
A typical winter day in Xam Nua reaches about 21°C and drops to 11°C overnight. The warmest of the three months is February, the coolest January.
Xam Nua weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 20° / 10° | 24 | 4.2 | 10.9 | 7.1 |
| Feb | 22° / 12° | 17 | 3.7 | 11.3 | 7.7 |
| Mar | 25° / 14° | 63 | 10.2 | 11.9 | 6.9 |
| Apr | 27° / 17° | 113 | 17.4 | 12.5 | 5.4 |
| May | 28° / 20° | 209 | 23.6 | 13 | 4.0 |
| Jun | 29° / 21° | 217 | 24.5 | 13.2 | 3.5 |
| Jul | 28° / 21° | 276 | 26.8 | 13.1 | 3.6 |
| Aug | 27° / 20° | 312 | 27.4 | 12.7 | 3.7 |
| Sep | 26° / 19° | 200 | 21.5 | 12.1 | 4.6 |
| Oct | 24° / 17° | 92 | 14.6 | 11.5 | 6.1 |
| Nov | 22° / 14° | 31 | 7 | 11 | 7.2 |
| Dec | 20° / 11° | 18 | 3.6 | 10.8 | 7.2 |
Cloud cover in Winter
The sky is clear or mostly clear about 37% of the time across winter.
Chance of precipitation in Winter
Xam Nua gets around 59 mm of rain over 12 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 6 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 10 h 54 min in early December to 11 h 30 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 3.6 kWh/m².
Hazard calendar for Xam Nua
None of Xam Nua's seasonal hazards peak in winter. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Xam Nua's monsoon runs May–September, when most of the year's rain falls.
Is winter a good time to visit Xam Nua?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is one of the better times to visit Xam Nua for general sightseeing.
What to pack for Xam Nua in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Xam Nua sees daytime highs around 21°C and nights near 11°C. Worth packing: light clothes. About 12 days see rain.
UV index in Xam Nua in Winter
Clear-sky midday UV across winter averages around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Xam Nua peaks around August 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 7 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 10 | 10 | 9 | 11 | 14 | 13 | 14 | 10 | 10 | 8 | 7 |
| Level | Very high | Very high | Extreme | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Very high |
| Mar | 10 | Extreme |
| Apr | 9 | Very high |
| May | 11 | Extreme |
| Jun | 14 | Extreme |
| Jul | 13 | Extreme |
| Aug | 14 | Extreme |
| Sep | 10 | Extreme |
| Oct | 10 | Very high |
| Nov | 8 | Very high |
| Dec | 7 | High |
Air quality in Xam Nua in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Xam Nua is worst in April — around 288 µg/m³ PM2.5 (very unhealthy), about 35.5× the cleanest month (August, 8 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 20 | 28 | 98 | 288 | 64 | 14 | 9 | 8 | 11 | 15 | 15 | 19 |
| Level | Moderate | Moderate | Unhealthy | Very unhealthy | Unhealthy | Moderate | Good | Good | Good | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 20 | Moderate |
| Feb | 28 | Moderate |
| Mar | 98 | Unhealthy |
| Apr | 288 | Very unhealthy |
| May | 64 | Unhealthy |
| Jun | 14 | Moderate |
| Jul | 9 | Good |
| Aug | 8 | Good |
| Sep | 11 | Good |
| Oct | 15 | Moderate |
| Nov | 15 | Moderate |
| Dec | 19 | Moderate |
Where is Xam Nua?
Xam Nua sits at 20.4°N, 104.0°E, 957 m above sea level, in Laos. The nearest listed city is Vieng Xai, 19 km away.
Topography around Xam Nua
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Xam Nua.
Within 3 km, the terrain around Xam Nua has significant variations in elevation — a maximum elevation change of 373 m around an average of 1,033 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,118 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,963 m.
The land around Xam Nua is covered by trees (65%) within 3 km, trees (83%) within 16 km, and trees (82%) within 80 km.
Laos travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B / C / E / F
- 230 V · 50 Hz
- Prices
- ≈ 23% of US
- price level, 2025
- GDP per capita
- $2,325
- 2025
- Happiness
- 5.5 / 10
- World Happiness, 2025
- Safe drinking water
- 35%
- of population, 2024
- Road deaths
- 17.9
- per 100k/yr, 2019
- Income group
- Lower middle
- World Bank
- English
- Low
- EF EPI 461
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Xam Nua (20.4164°, 104.045°, elevation 957 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.