Cha-am in Fall
In fall (September, October and November), Cha-am sees average daytime highs around 30°C and overnight lows near 26°C, with 468 mm of rain over about 52 wet days across the season. It is the 3rd-warmest season and the wettest season of the year.
Across fall, daytime highs hold fairly steady around 30°C. The sky is clear or mostly clear about 19% of the time across fall, and the air most often feels oppressive.
Fall is Cha-am's 2nd-best season 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
- 30°C
- 3rd-warmest season
- Avg overnight low
- 26°C
- Rainfall
- 468 mm
- 52 wet days
- Avg wind
- 10 km/h
- Travel score
- 4.2
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Cha-am in Fall
Across fall, daytime highs hold fairly steady around 30°C.
A typical fall day in Cha-am reaches about 30°C and drops to 26°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Cha-am
Once humidity and wind are folded in, fall brings about 87 days that feel above 32°C and 0 that feel at or below 0°C.
The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Cha-am 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 | 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 Fall
The sky is clear or mostly clear about 19% of the time across fall.
Chance of precipitation in Fall
Cha-am gets around 468 mm of rain over 52 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 10 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 18 min in early September to 11 h 18 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 4.6 kWh/m².
Hazard calendar for Cha-am
In fall, Cha-am overlaps its cyclone and rainy season 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 fall a good time to visit Cha-am?
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 Cha-am for sightseeing.
What to pack for Cha-am in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Cha-am sees daytime highs around 30°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 52 days see rain.
Sea temperature near Cha-am in Fall
The nearest coast averages about 29°C across fall — 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 Fall
Clear-sky midday UV across fall averages around 11 (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 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 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.