Nong Khai in Winter
In winter (December, January and February), Nong Khai sees average daytime highs around 30°C and overnight lows near 18°C, with 31 mm of rain over about 5 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 29°C in early December to 32°C by late February. The sky is clear or mostly clear about 70% of the time across winter, and the air most often feels humid.
Winter is Nong Khai's best season of the year to visit on our travel score. For the whole year in context, see Nong Khai's year-round climate.
- Avg daytime high
- 30°C
- coldest season of the year
- Avg overnight low
- 18°C
- Rainfall
- 31 mm
- 5 wet days
- Avg wind
- 7 km/h
- Travel score
- 6.6
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Nong Khai in Winter
Over the season highs climb from about 29°C in early December to 32°C by late February.
A typical winter day in Nong Khai reaches about 30°C and drops to 18°C overnight. The warmest of the three months is February, the coolest January.
How winter really feels in Nong Khai
Once humidity and wind are folded in, winter brings about 12 days that feel above 32°C and 0 that feel at or below 0°C.
The story in winter is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Nong Khai 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 | 29° / 17° | 9 | 1.6 | 11 | 7.0 |
| Feb | 31° / 19° | 14 | 2 | 11.4 | 5.7 |
| Mar | 34° / 22° | 31 | 5.6 | 11.9 | 3.8 |
| Apr | 35° / 25° | 66 | 10.6 | 12.4 | 2.6 |
| May | 33° / 25° | 245 | 22.6 | 12.8 | 2.3 |
| Jun | 32° / 26° | 314 | 25.5 | 13.1 | 2.3 |
| Jul | 32° / 26° | 379 | 27.4 | 13 | 2.4 |
| Aug | 31° / 25° | 406 | 27.9 | 12.6 | 2.4 |
| Sep | 31° / 25° | 297 | 24.5 | 12.1 | 2.7 |
| Oct | 31° / 24° | 93 | 11.5 | 11.6 | 4.2 |
| Nov | 31° / 21° | 19 | 3.1 | 11.2 | 5.8 |
| Dec | 29° / 18° | 8 | 1.3 | 10.9 | 7.2 |
Cloud cover in Winter
The sky is clear or mostly clear about 70% of the time across winter.
Chance of precipitation in Winter
Nong Khai gets around 31 mm of rain over 5 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 7 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 11 hours in early December to 11 h 36 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 4.8 kWh/m².
Hazard calendar for Nong Khai
In winter, Nong Khai overlaps its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Nong Khai sits in the Pacific typhoon belt; the season peaks July–October.
Nong Khai's monsoon runs May–September, when most of the year's rain falls.
Is winter a good time to visit Nong Khai?
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 a reasonable time to visit Nong Khai for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Nong Khai in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Nong Khai sees daytime highs around 30°C and nights near 18°C. Pack light clothes. Worth having: sun protection. About 5 days see rain.
UV index in Nong Khai 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 Nong Khai peaks around August 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (very 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 | 12 | 10 | 11 | 13 | 13 | 13 | 11 | 10 | 8 | 7 |
| Level | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Very high |
| Mar | 12 | Extreme |
| Apr | 10 | Extreme |
| May | 11 | Extreme |
| Jun | 13 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Extreme |
| Nov | 8 | Very high |
| Dec | 7 | Very high |
Air quality in Nong Khai 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 Nong Khai is worst in March — around 77 µg/m³ PM2.5 (unhealthy), about 3.4× the cleanest month (July, 23 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) | 31 | 44 | 77 | 73 | 32 | 24 | 23 | 23 | 24 | 26 | 25 | 26 |
| Level | Moderate | Poor | Unhealthy | Unhealthy | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 31 | Moderate |
| Feb | 44 | Poor |
| Mar | 77 | Unhealthy |
| Apr | 73 | Unhealthy |
| May | 32 | Moderate |
| Jun | 24 | Moderate |
| Jul | 23 | Moderate |
| Aug | 23 | Moderate |
| Sep | 24 | Moderate |
| Oct | 26 | Moderate |
| Nov | 25 | Moderate |
| Dec | 26 | Moderate |
Where is Nong Khai?
Nong Khai sits at 17.9°N, 102.7°E, 168 m above sea level, in Thailand. The nearest listed city is Tha Bo, 17 km away.
Topography around Nong Khai
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nong Khai.
Within 3 km, the terrain around Nong Khai has only modest variations in elevation — a maximum elevation change of 31 m around an average of 168 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 47 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,489 m.
The land around Nong Khai is covered by trees (34%) and artificial surfaces (32%) within 3 km, cropland (44%) and trees (31%) within 16 km, and trees (51%) and cropland (41%) within 80 km.
Thailand travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B / C
- 230 V · 50 Hz
- Prices
- ≈ 31% of US
- price level, 2025
- GDP per capita
- $8,057
- 2025
- Happiness
- 6.3 / 10
- World Happiness, 2025
- Homicide rate
- 4.8
- per 100k, 2011
- Road deaths
- 32.2
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very low
- EF EPI 402
- 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 Nong Khai (17.8785°, 102.742°, elevation 168 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.