Xam Nua in Fall
In fall (September, October and November), Xam Nua sees average daytime highs around 24°C and overnight lows near 17°C, with 322 mm of rain over about 43 wet days across the season. It is the 3rd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 27°C in early September to 21°C by late November. The sky is clear or mostly clear about 20% of the time across fall, and the air most often feels muggy.
Fall is Xam Nua's 2nd-best season to visit on our travel score. For the whole year in context, see Xam Nua's year-round climate.
- Avg daytime high
- 24°C
- 3rd-warmest season
- Avg overnight low
- 17°C
- Rainfall
- 322 mm
- 43 wet days
- Avg wind
- 5 km/h
- Travel score
- 6.0
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Xam Nua in Fall
Over the season highs ease from about 27°C in early September to 21°C by late November.
A typical fall day in Xam Nua reaches about 24°C and drops to 17°C overnight. The warmest of the three months is September, the coolest November.
Xam Nua weather by month
How the three fall months (September, October and November) 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 Fall
The sky is clear or mostly clear about 20% of the time across fall.
Chance of precipitation in Fall
Xam Nua gets around 322 mm of rain over 43 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 5 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 24 min in early September to 10 h 54 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.9 kWh/m².
Hazard calendar for Xam Nua
In fall, Xam Nua overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
Xam Nua's monsoon runs May–September, when most of the year's rain falls.
Is fall a good time to visit Xam Nua?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Xam Nua for sightseeing.
What to pack for Xam Nua in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Xam Nua sees daytime highs around 24°C and nights near 17°C. Pack rain gear. Worth having: light clothes. About 43 days see rain.
UV index in Xam Nua in Fall
Clear-sky midday UV across fall averages around 9 (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 Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall 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.