Smach Mean Chey in Fall
In fall (September, October and November), Smach Mean Chey sees average daytime highs around 29°C and overnight lows near 25°C, with 912 mm of rain over about 70 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs climb from about 28°C in early September to 30°C by late November. The sky is clear or mostly clear about 10% of the time across fall, and the air most often feels oppressive.
Fall is Smach Mean Chey's 2nd-best season to visit on our travel score. Smach Mean Chey 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 Smach Mean Chey's year-round climate.
- Avg daytime high
- 29°C
- 3rd-warmest season
- Avg overnight low
- 25°C
- Rainfall
- 912 mm
- 70 wet days
- Avg wind
- 8 km/h
- Travel score
- 3.7
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Smach Mean Chey in Fall
Over the season highs climb from about 28°C in early September to 30°C by late November.
A typical fall day in Smach Mean Chey reaches about 29°C and drops to 25°C overnight. The warmest of the three months is November, the coolest November.
How fall really feels in Smach Mean Chey
Once humidity and wind are folded in, fall brings about 71 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.
Smach Mean Chey 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° / 23° | 40 | 8 | 11.4 | 5.6 |
| Feb | 29° / 24° | 46 | 10.1 | 11.6 | 5.4 |
| Mar | 30° / 25° | 104 | 18.4 | 11.9 | 4.3 |
| Apr | 30° / 25° | 144 | 23.1 | 12.2 | 3.4 |
| May | 29° / 26° | 363 | 29 | 12.5 | 2.9 |
| Jun | 29° / 25° | 515 | 28.9 | 12.7 | 3.0 |
| Jul | 28° / 25° | 614 | 30.1 | 12.6 | 3.2 |
| Aug | 28° / 25° | 596 | 30.3 | 12.4 | 3.2 |
| Sep | 28° / 25° | 520 | 29.3 | 12.1 | 3.2 |
| Oct | 29° / 25° | 310 | 26.7 | 11.7 | 3.4 |
| Nov | 30° / 25° | 82 | 13.9 | 11.5 | 4.5 |
| Dec | 30° / 24° | 31 | 6.7 | 11.3 | 5.4 |
Cloud cover in Fall
The sky is clear or mostly clear about 10% of the time across fall.
Chance of precipitation in Fall
Smach Mean Chey gets around 912 mm of rain over 70 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 24 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 Smach Mean Chey
In fall, Smach Mean Chey overlaps its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.
Smach Mean Chey sits in the Pacific typhoon belt; the season peaks July–October.
Smach Mean Chey's monsoon runs May–October, when most of the year's rain falls.
Is fall a good time to visit Smach Mean Chey?
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 Smach Mean Chey.
What to pack for Smach Mean Chey in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Smach Mean Chey sees daytime highs around 29°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 70 days see rain.
Sea temperature near Smach Mean Chey 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 20 km away) is warmest in May at about 31°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 | 29 | 29 | 30 | 31 | 30 | 29 | 29 | 29 | 29 | 29 | 29 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Tropical |
| Feb | 29 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 31 | Tropical |
| Jun | 30 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 29 | Tropical |
UV index in Smach Mean Chey 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 Smach Mean Chey peaks around August 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 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 | 11 | 12 | 12 | 11 | 12 | 12 | 14 | 13 | 11 | 9 | 9 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Extreme |
| Feb | 11 | Extreme |
| Mar | 12 | Extreme |
| Apr | 12 | Extreme |
| May | 11 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 14 | Extreme |
| Sep | 13 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 9 | Very high |
Air quality in Smach Mean Chey 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 Smach Mean Chey is worst in February — around 24 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (November, 9 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) | 19 | 24 | 19 | 16 | 12 | 12 | 14 | 12 | 10 | 10 | 9 | 11 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Moderate | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 19 | Moderate |
| Feb | 24 | Moderate |
| Mar | 19 | Moderate |
| Apr | 16 | Moderate |
| May | 12 | Moderate |
| Jun | 12 | Good |
| Jul | 14 | Moderate |
| Aug | 12 | Good |
| Sep | 10 | Good |
| Oct | 10 | Good |
| Nov | 9 | Good |
| Dec | 11 | Good |
Where is Smach Mean Chey?
Smach Mean Chey sits at 11.5°N, 103.0°E, 5 m above sea level, in Cambodia. The nearest listed city is Koh Kong, 10 km away.
Topography around Smach Mean Chey
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Smach Mean Chey.
Within 3 km, the terrain around Smach Mean Chey has only modest variations in elevation — a maximum elevation change of 57 m around an average of 4 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 480 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,727 m.
The land around Smach Mean Chey is covered by mangroves (43%) and water (34%) within 3 km, trees (39%) and water (35%) within 16 km, and trees (51%) and water (43%) within 80 km.
Cambodia travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / C / G
- 230 V · 50 Hz
- Prices
- ≈ 34% of US
- price level, 2025
- GDP per capita
- $2,872
- 2025
- Happiness
- 4.5 / 10
- World Happiness, 2025
- Safe drinking water
- 30%
- of population, 2024
- Homicide rate
- 1.8
- per 100k, 2011
- Road deaths
- 19.6
- per 100k/yr, 2019
- Income group
- Lower middle
- World Bank
- English
- Very low
- EF EPI 390
- 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 Smach Mean Chey (11.5466°, 103.0357°, 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.