Cha-am in Winter
In winter (December, January and February), Cha-am sees average daytime highs around 29°C and overnight lows near 25°C, with 44 mm of rain over about 7 wet days across the season. It is the coldest season of the year and the driest season of the year.
Across winter, daytime highs hold fairly steady around 29°C. The sky is clear or mostly clear about 57% of the time across winter, and the air most often feels oppressive.
Winter is Cha-am's best season of the year to visit on our travel score. Cha-am has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Cha-am's year-round climate.
- Avg daytime high
- 29°C
- coldest season of the year
- Avg overnight low
- 25°C
- Rainfall
- 44 mm
- 7 wet days
- Avg wind
- 13 km/h
- Travel score
- 6.7
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Cha-am in Winter
Across winter, daytime highs hold fairly steady around 29°C.
A typical winter day in Cha-am reaches about 29°C and drops to 25°C overnight. The warmest of the three months is February, the coolest January.
How winter really feels in Cha-am
Once humidity and wind are folded in, winter brings about 21 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.
Cha-am 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° / 24° | 17 | 2.6 | 11.3 | 6.9 |
| Feb | 30° / 25° | 10 | 2 | 11.6 | 6.4 |
| Mar | 31° / 26° | 48 | 5.4 | 11.9 | 5.2 |
| Apr | 32° / 27° | 53 | 8.8 | 12.3 | 4.1 |
| May | 32° / 28° | 91 | 17.5 | 12.6 | 3.1 |
| Jun | 32° / 27° | 62 | 14.3 | 12.7 | 3.4 |
| Jul | 31° / 27° | 81 | 16.2 | 12.7 | 3.5 |
| Aug | 31° / 27° | 86 | 18.3 | 12.4 | 3.4 |
| Sep | 30° / 26° | 140 | 20 | 12.1 | 3.4 |
| Oct | 29° / 26° | 253 | 23.1 | 11.7 | 3.7 |
| Nov | 29° / 26° | 76 | 8.6 | 11.4 | 5.5 |
| Dec | 29° / 24° | 17 | 2.6 | 11.3 | 6.8 |
Cloud cover in Winter
The sky is clear or mostly clear about 57% of the time across winter.
Chance of precipitation in Winter
Cha-am gets around 44 mm of rain over 7 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 13 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 11 h 18 min in early December to 11 h 42 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 5.3 kWh/m².
Hazard calendar for Cha-am
In winter, Cha-am overlaps its cyclone season. The full year is below, with each hazard's peak months called out.
Cha-am sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.
Cha-am's rainy season runs September–October, when most of the year's rain falls.
Is winter a good time to visit Cha-am?
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 Cha-am for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Cha-am in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Cha-am sees daytime highs around 29°C and nights near 25°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.
Sea temperature near Cha-am in Winter
The nearest coast averages about 28°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 19 km away) is warmest in May at about 31°C and coldest in January near 27°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 28 | 29 | 30 | 31 | 30 | 30 | 29 | 29 | 29 | 29 | 28 |
| Comfort | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 28 | Warm |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 31 | Tropical |
| Jun | 30 | Tropical |
| Jul | 30 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Warm |
UV index in Cha-am in Winter
Clear-sky midday UV across winter 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 Cha-am peaks around August 16 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 9 (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) | 9 | 10 | 12 | 12 | 12 | 12 | 12 | 14 | 12 | 11 | 9 | 9 |
| Level | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 9 | Very high |
| Feb | 10 | Very high |
| Mar | 12 | Extreme |
| Apr | 12 | Extreme |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 14 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 9 | Very high |
Air quality in Cha-am 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 Cha-am is worst in February — around 34 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (August, 14 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) | 32 | 34 | 34 | 31 | 19 | 14 | 15 | 14 | 14 | 22 | 27 | 29 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 32 | Moderate |
| Feb | 34 | Moderate |
| Mar | 34 | Moderate |
| Apr | 31 | Moderate |
| May | 19 | Moderate |
| Jun | 14 | Moderate |
| Jul | 15 | Moderate |
| Aug | 14 | Moderate |
| Sep | 14 | Moderate |
| Oct | 22 | Moderate |
| Nov | 27 | Moderate |
| Dec | 29 | Moderate |
Where is Cha-am?
Cha-am sits at 12.8°N, 100.0°E, 5 m above sea level, in Thailand. The nearest listed city is Tha Yang, 19 km away.
Topography around Cha-am
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Cha-am.
Within 3 km, the terrain around Cha-am has only modest variations in elevation — a maximum elevation change of 214 m around an average of 7 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 643 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,314 m.
The land around Cha-am is covered by artificial surfaces (22%), trees (21%) and grassland (20%) within 3 km, water (41%) and trees (27%) within 16 km, and trees (46%) and water (40%) 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 Cha-am (12.8°, 99.9667°, elevation 5 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.