Đồng Hới in Fall
In fall (September, October and November), Đồng Hới sees average daytime highs around 27°C and overnight lows near 23°C, with 1241 mm of rain over about 65 wet days across the season. It is the 3rd-warmest season and the wettest season of the year.
Over the season highs ease from about 30°C in early September to 23°C by late November. The sky is clear or mostly clear about 18% of the time across fall, and the air most often feels oppressive.
Fall is Đồng Hới's 3rd-best season to visit on our travel score. For the whole year in context, see Đồng Hới's year-round climate.
- Avg daytime high
- 27°C
- 3rd-warmest season
- Avg overnight low
- 23°C
- Rainfall
- 1241 mm
- 65 wet days
- Avg wind
- 13 km/h
- Travel score
- 4.4
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Đồng Hới in Fall
Over the season highs ease from about 30°C in early September to 23°C by late November.
A typical fall day in Đồng Hới reaches about 27°C and drops to 23°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Đồng Hới
Once humidity and wind are folded in, fall brings about 27 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.
Đồng Hới 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 | 21° / 18° | 125 | 17.4 | 11.1 | 5.2 |
| Feb | 22° / 18° | 77 | 13.8 | 11.4 | 5.8 |
| Mar | 25° / 21° | 82 | 13.3 | 11.9 | 6.2 |
| Apr | 28° / 23° | 88 | 12.8 | 12.4 | 5.6 |
| May | 30° / 26° | 112 | 14.7 | 12.8 | 4.2 |
| Jun | 32° / 27° | 63 | 8.1 | 13 | 3.9 |
| Jul | 32° / 27° | 94 | 10 | 12.9 | 3.9 |
| Aug | 31° / 26° | 146 | 13.5 | 12.6 | 3.9 |
| Sep | 29° / 25° | 345 | 19.6 | 12.1 | 3.9 |
| Oct | 27° / 24° | 531 | 24 | 11.6 | 4.5 |
| Nov | 25° / 21° | 366 | 20.9 | 11.2 | 4.9 |
| Dec | 22° / 19° | 228 | 20.3 | 11 | 4.8 |
Cloud cover in Fall
The sky is clear or mostly clear about 18% of the time across fall.
Chance of precipitation in Fall
Đồng Hới gets around 1241 mm of rain over 65 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 13 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 18 min in early September to 11 hours 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 3.7 kWh/m².
Hazard calendar for Đồng Hới
In fall, Đồng Hới overlaps its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.
Đồng Hới sits in the Pacific typhoon belt; the season peaks July–October.
Đồng Hới's monsoon runs September–November, when most of the year's rain falls.
Is fall a good time to visit Đồng Hới?
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 Đồng Hới for sightseeing.
What to pack for Đồng Hới in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Đồng Hới sees daytime highs around 27°C and nights near 23°C. Pack light clothes and rain gear. About 65 days see rain.
Sea temperature near Đồng Hới in Fall
The nearest coast averages about 28°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 17 km away) is warmest in August at about 30°C and coldest in February near 22°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) | 22 | 22 | 23 | 25 | 28 | 29 | 29 | 30 | 29 | 28 | 26 | 24 |
| Comfort | Refreshing | Refreshing | Refreshing | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Warm | Warm | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 22 | Refreshing |
| Feb | 22 | Refreshing |
| Mar | 23 | Refreshing |
| Apr | 25 | Warm |
| May | 28 | Warm |
| Jun | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 30 | Tropical |
| Sep | 29 | Tropical |
| Oct | 28 | Warm |
| Nov | 26 | Warm |
| Dec | 24 | Refreshing |
UV index in Đồng Hới in Fall
Clear-sky midday UV across fall averages around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Đồng Hới peaks around August 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 6 (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) | 8 | 10 | 9 | 9 | 12 | 12 | 13 | 13 | 11 | 10 | 8 | 6 |
| Level | Very high | Very high | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Very high |
| Mar | 9 | Very high |
| Apr | 9 | Very high |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Very high |
| Nov | 8 | Very high |
| Dec | 6 | High |
Air quality in Đồng Hới 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 Đồng Hới is worst in April — around 65 µg/m³ PM2.5 (unhealthy), about 4.9× the cleanest month (July, 13 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) | 20 | 26 | 62 | 65 | 21 | 14 | 13 | 14 | 16 | 20 | 18 | 21 |
| Level | Moderate | Moderate | Unhealthy | Unhealthy | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 20 | Moderate |
| Feb | 26 | Moderate |
| Mar | 62 | Unhealthy |
| Apr | 65 | Unhealthy |
| May | 21 | Moderate |
| Jun | 14 | Moderate |
| Jul | 13 | Moderate |
| Aug | 14 | Moderate |
| Sep | 16 | Moderate |
| Oct | 20 | Moderate |
| Nov | 18 | Moderate |
| Dec | 21 | Moderate |
Where is Đồng Hới?
Đồng Hới sits at 17.5°N, 106.6°E, 9 m above sea level, in Vietnam. The nearest listed city is Quán Hàu, 7.0 km away.
Topography around Đồng Hới
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Đồng Hới.
Within 3 km, the terrain around Đồng Hới has only modest variations in elevation — a maximum elevation change of 22 m around an average of 4 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 711 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,630 m.
The land around Đồng Hới is covered by artificial surfaces (38%) and water (29%) within 3 km, water (45%) and trees (29%) within 16 km, and trees (61%) and water (32%) 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 Đồng Hới (17.4688°, 106.6223°, elevation 9 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.