Phong Thạnh in Fall
In fall (September, October and November), Phong Thạnh sees average daytime highs around 31°C and overnight lows near 25°C, with 952 mm of rain over about 80 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Across fall, daytime highs hold fairly steady around 31°C. The sky is clear or mostly clear about 4% of the time across fall, and the air most often feels miserable.
Fall is Phong Thạnh's 3rd-best season to visit on our travel score. For the whole year in context, see Phong Thạnh's year-round climate.
- Avg daytime high
- 31°C
- coldest season of the year
- Avg overnight low
- 25°C
- Rainfall
- 952 mm
- 80 wet days
- Avg wind
- 8 km/h
- Travel score
- 2.8
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Phong Thạnh in Fall
Across fall, daytime highs hold fairly steady around 31°C.
A typical fall day in Phong Thạnh reaches about 31°C and drops to 25°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Phong Thạnh
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.
Phong Thạnh 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 | 30° / 23° | 33 | 6 | 11.5 | 5.1 |
| Feb | 32° / 24° | 19 | 3.4 | 11.7 | 4.8 |
| Mar | 33° / 25° | 59 | 8.8 | 11.9 | 3.7 |
| Apr | 33° / 26° | 119 | 16.6 | 12.2 | 2.8 |
| May | 33° / 26° | 257 | 26.9 | 12.4 | 2.2 |
| Jun | 31° / 25° | 288 | 28.4 | 12.5 | 2.3 |
| Jul | 31° / 25° | 300 | 29.6 | 12.5 | 2.4 |
| Aug | 31° / 25° | 286 | 29.4 | 12.3 | 2.4 |
| Sep | 31° / 25° | 337 | 28.9 | 12.1 | 2.4 |
| Oct | 31° / 25° | 406 | 29 | 11.8 | 2.6 |
| Nov | 30° / 24° | 209 | 22.2 | 11.6 | 3.3 |
| Dec | 30° / 24° | 101 | 12.7 | 11.5 | 4.5 |
Cloud cover in Fall
The sky is clear or mostly clear about 4% of the time across fall.
Chance of precipitation in Fall
Phong Thạnh gets around 952 mm of rain over 80 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels miserable — 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 4.4 kWh/m².
Hazard calendar for Phong Thạnh
In fall, Phong Thạnh overlaps its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.
Phong Thạnh sits in the Pacific typhoon belt; the season peaks July–October.
Phong Thạnh's rainy season runs May–November, when most of the year's rain falls.
Is fall a good time to visit Phong Thạnh?
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 Phong Thạnh.
What to pack for Phong Thạnh in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Phong Thạnh sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. About 80 days see rain.
Sea temperature near Phong Thạnh 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 38 km away) is warmest in May at about 30°C and coldest in January near 26°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) | 26 | 26 | 28 | 29 | 30 | 30 | 29 | 29 | 29 | 29 | 28 | 27 |
| Comfort | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 26 | Warm |
| Feb | 26 | Warm |
| Mar | 28 | Warm |
| Apr | 29 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 28 | Tropical |
| Dec | 27 | Warm |
UV index in Phong Thạnh 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 Phong Thạnh peaks around March 21 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 10 (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 | 13 | 12 | 12 | 12 | 13 | 11 | 10 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Extreme |
| Feb | 12 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 13 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 12 | Extreme |
| Sep | 13 | Extreme |
| Oct | 11 | Extreme |
| Nov | 10 | Extreme |
| Dec | 10 | Very high |
Air quality in Phong Thạnh 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 Phong Thạnh is worst in December — around 22 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (May, 12 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 | 17 | 15 | 14 | 12 | 13 | 15 | 13 | 14 | 15 | 18 | 22 |
| Level | Moderate | Moderate | Moderate | Moderate | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 19 | Moderate |
| Feb | 17 | Moderate |
| Mar | 15 | Moderate |
| Apr | 14 | Moderate |
| May | 12 | Good |
| Jun | 13 | Moderate |
| Jul | 15 | Moderate |
| Aug | 13 | Moderate |
| Sep | 14 | Moderate |
| Oct | 15 | Moderate |
| Nov | 18 | Moderate |
| Dec | 22 | Moderate |
Where is Phong Thạnh?
Phong Thạnh sits at 9.3°N, 105.3°E, 1 m above sea level, in Vietnam. The nearest listed city is Ấp Hô Phòng, 13 km away.
Topography around Phong Thạnh
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Phong Thạnh.
Within 3 km, the terrain around Phong Thạnh has only modest variations in elevation — a maximum elevation change of 6 m around an average of 1 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 10 m; within 80 km, only modest variations in elevation — a maximum elevation change of 22 m.
The land around Phong Thạnh is covered by cropland (38%) and water (38%) within 3 km, cropland (50%) and water (33%) within 16 km, and water (46%) and cropland (35%) within 80 km.
Vietnam travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B / C / F
- 220 V · 50 Hz
- Prices
- ≈ 29% of US
- price level, 2025
- GDP per capita
- $5,066
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Safe drinking water
- 59%
- of population, 2024
- Homicide rate
- 1.5
- per 100k, 2011
- Road deaths
- 30.6
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Moderate
- EF EPI 500
- 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 Phong Thạnh (9.3236°, 105.3464°, elevation 1 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.