Lang Suan in Fall
In fall (September, October and November), Lang Suan sees average daytime highs around 30°C and overnight lows near 23°C, with 841 mm of rain over about 76 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 7% of the time across fall, and the air most often feels oppressive.
Fall is Lang Suan's 2nd-best season to visit on our travel score. For the whole year in context, see Lang Suan's year-round climate.
- Avg daytime high
- 30°C
- 3rd-warmest season
- Avg overnight low
- 23°C
- Rainfall
- 841 mm
- 76 wet days
- Avg wind
- 8 km/h
- Travel score
- 3.1
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Lang Suan in Fall
Across fall, daytime highs hold fairly steady around 30°C.
A typical fall day in Lang Suan reaches about 30°C and drops to 23°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Lang Suan
Once humidity and wind are folded in, fall brings about 91 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.
Lang Suan 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° / 22° | 68 | 10.4 | 11.5 | 5.3 |
| Feb | 31° / 22° | 38 | 7.8 | 11.7 | 5.0 |
| Mar | 32° / 23° | 93 | 11.5 | 11.9 | 3.9 |
| Apr | 33° / 24° | 118 | 16.1 | 12.2 | 2.9 |
| May | 32° / 25° | 201 | 24.3 | 12.4 | 2.4 |
| Jun | 31° / 25° | 188 | 21.7 | 12.6 | 2.9 |
| Jul | 31° / 24° | 206 | 23.3 | 12.5 | 3.0 |
| Aug | 31° / 24° | 225 | 24.7 | 12.3 | 2.9 |
| Sep | 30° / 24° | 302 | 26.6 | 12.1 | 2.8 |
| Oct | 30° / 23° | 326 | 27.4 | 11.8 | 2.9 |
| Nov | 29° / 23° | 214 | 21.9 | 11.5 | 3.7 |
| Dec | 29° / 22° | 103 | 13.8 | 11.4 | 5.0 |
Cloud cover in Fall
The sky is clear or mostly clear about 7% of the time across fall.
Chance of precipitation in Fall
Lang Suan gets around 841 mm of rain over 76 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 8 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 12 min in early September to 11 h 30 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 4.5 kWh/m².
Hazard calendar for Lang Suan
In fall, Lang Suan overlaps its cyclone and rainy season season. The full year is below, with each hazard's peak months called out.
Lang Suan sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.
Lang Suan's rainy season runs May–November, when most of the year's rain falls.
Is fall a good time to visit Lang Suan?
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 weaker month for outdoor sightseeing in Lang Suan.
What to pack for Lang Suan in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Lang Suan sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 76 days see rain.
Sea temperature near Lang Suan 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 33 km away) is warmest in May at about 30°C and coldest in January near 28°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) | 28 | 28 | 29 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 28 |
| Comfort | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Warm |
| Feb | 28 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Warm |
UV index in Lang Suan 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 Lang Suan peaks around August 20 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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) | 10 | 12 | 13 | 13 | 12 | 12 | 12 | 14 | 13 | 11 | 10 | 9 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Very high |
| Feb | 12 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 14 | Extreme |
| Sep | 13 | Extreme |
| Oct | 11 | Extreme |
| Nov | 10 | Very high |
| Dec | 9 | Very high |
Air quality in Lang Suan 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 Lang Suan is worst in January — around 19 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 19 | 18 | 18 | 18 | 15 | 14 | 15 | 13 | 13 | 13 | 13 | 14 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 19 | Moderate |
| Feb | 18 | Moderate |
| Mar | 18 | Moderate |
| Apr | 18 | Moderate |
| May | 15 | Moderate |
| Jun | 14 | Moderate |
| Jul | 15 | Moderate |
| Aug | 13 | Moderate |
| Sep | 13 | Moderate |
| Oct | 13 | Moderate |
| Nov | 13 | Moderate |
| Dec | 14 | Moderate |
Where is Lang Suan?
Lang Suan sits at 9.9°N, 99.1°E, 11 m above sea level, in Thailand. The nearest listed city is Ranong, 49 km away.
Topography around Lang Suan
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Lang Suan.
Within 3 km, the terrain around Lang Suan has only modest variations in elevation — a maximum elevation change of 131 m around an average of 13 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 780 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,296 m.
The land around Lang Suan is covered by trees (78%) within 3 km, trees (74%) within 16 km, and trees (50%) and water (47%) 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 Lang Suan (9.9456°, 99.0785°, elevation 11 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.