Kiến An in Fall
In fall (September, October and November), Kiến An sees average daytime highs around 28°C and overnight lows near 24°C, with 483 mm of rain over about 41 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
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 38% of the time across fall, and the air most often feels miserable.
Fall is Kiến An's 3rd-best season to visit on our travel score. For the whole year in context, see Kiến An's year-round climate.
- Avg daytime high
- 28°C
- 2nd-warmest season
- Avg overnight low
- 24°C
- Rainfall
- 483 mm
- 41 wet days
- Avg wind
- 12 km/h
- Travel score
- 5.6
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Kiến An 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 Kiến An reaches about 28°C and drops to 24°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Kiến An
Once humidity and wind are folded in, fall brings about 37 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.
Kiến An 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 | 19° / 16° | 37 | 7 | 10.9 | 6.3 |
| Feb | 20° / 17° | 22 | 5.5 | 11.3 | 6.5 |
| Mar | 22° / 19° | 39 | 7.6 | 11.9 | 6.7 |
| Apr | 26° / 23° | 57 | 8.4 | 12.5 | 6.7 |
| May | 29° / 26° | 207 | 16.9 | 13 | 4.5 |
| Jun | 31° / 28° | 214 | 18.4 | 13.2 | 3.3 |
| Jul | 31° / 28° | 281 | 20.1 | 13.1 | 3.2 |
| Aug | 31° / 27° | 381 | 24.4 | 12.7 | 3.0 |
| Sep | 30° / 26° | 290 | 20 | 12.1 | 3.8 |
| Oct | 28° / 24° | 133 | 12.4 | 11.5 | 5.9 |
| Nov | 25° / 21° | 60 | 8.2 | 11 | 7.2 |
| Dec | 21° / 17° | 37 | 6.5 | 10.8 | 6.9 |
Cloud cover in Fall
The sky is clear or mostly clear about 38% of the time across fall.
Chance of precipitation in Fall
Kiến An gets around 483 mm of rain over 41 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 12 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 24 min in early September to 10 h 48 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 4.1 kWh/m².
Hazard calendar for Kiến An
In fall, Kiến An overlaps its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.
Kiến An sits in the Pacific typhoon belt; the season peaks July–October.
Kiến An's monsoon runs May–September, when most of the year's rain falls.
Is fall a good time to visit Kiến An?
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 Kiến An for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Kiến An in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Kiến An sees daytime highs around 28°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 41 days see rain.
Sea temperature near Kiến An 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 20 km away) is warmest in August at about 30°C and coldest in February near 20°C.
It's comfortable for a long swim from Feb 24 to Feb 2 — about 11.3 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 20 | 20 | 21 | 23 | 27 | 29 | 30 | 30 | 30 | 28 | 26 | 23 |
| Comfort | Refreshing | Cool | Refreshing | Refreshing | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Warm | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 20 | Refreshing |
| Feb | 20 | Cool |
| Mar | 21 | Refreshing |
| Apr | 23 | Refreshing |
| May | 27 | Warm |
| Jun | 29 | Tropical |
| Jul | 30 | Tropical |
| Aug | 30 | Tropical |
| Sep | 30 | Tropical |
| Oct | 28 | Tropical |
| Nov | 26 | Warm |
| Dec | 23 | Refreshing |
UV index in Kiến An in Fall
Clear-sky midday UV across fall averages around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Kiến An peaks around July 12 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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) | 7 | 8 | 8 | 8 | 10 | 11 | 12 | 7 | 8 | 9 | 7 | 6 |
| Level | High | Very high | Very high | Very high | Very high | Extreme | Extreme | Very high | Very high | Very high | High | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 7 | High |
| Feb | 8 | Very high |
| Mar | 8 | Very high |
| Apr | 8 | Very high |
| May | 10 | Very high |
| Jun | 11 | Extreme |
| Jul | 12 | Extreme |
| Aug | 7 | Very high |
| Sep | 8 | Very high |
| Oct | 9 | Very high |
| Nov | 7 | High |
| Dec | 6 | High |
Air quality in Kiến An 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 Kiến An is worst in December — around 92 µg/m³ PM2.5 (unhealthy), about 2.6× the cleanest month (July, 35 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) | 90 | 80 | 76 | 66 | 49 | 37 | 35 | 40 | 59 | 74 | 82 | 92 |
| Level | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor | Poor | Moderate | Poor | Unhealthy | Unhealthy | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 90 | Unhealthy |
| Feb | 80 | Unhealthy |
| Mar | 76 | Unhealthy |
| Apr | 66 | Unhealthy |
| May | 49 | Poor |
| Jun | 37 | Poor |
| Jul | 35 | Moderate |
| Aug | 40 | Poor |
| Sep | 59 | Unhealthy |
| Oct | 74 | Unhealthy |
| Nov | 82 | Unhealthy |
| Dec | 92 | Unhealthy |
Where is Kiến An?
Kiến An sits at 20.8°N, 106.6°E, 10 m above sea level, in Vietnam. The nearest listed city is Haiphong, 9.0 km away.
Topography around Kiến An
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Kiến An.
Within 3 km, the terrain around Kiến An has only modest variations in elevation — a maximum elevation change of 136 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 138 m; within 80 km, large variations in elevation — a maximum elevation change of 1,180 m.
The land around Kiến An is covered by artificial surfaces (33%), trees (29%) and cropland (21%) within 3 km, cropland (34%) and artificial surfaces (24%) within 16 km, and trees (31%), water (30%) and cropland (28%) 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 Kiến An (20.8053°, 106.6256°, elevation 10 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.