Nam Định in Fall
In fall (September, October and November), Nam Định sees average daytime highs around 29°C and overnight lows near 23°C, with 481 mm of rain over about 43 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 31°C in early September to 24°C by late November. The sky is clear or mostly clear about 27% of the time across fall, and the air most often feels miserable.
Fall is Nam Định's 3rd-best season to visit on our travel score. For the whole year in context, see Nam Định's year-round climate.
- Avg daytime high
- 29°C
- 2nd-warmest season
- Avg overnight low
- 23°C
- Rainfall
- 481 mm
- 43 wet days
- Avg wind
- 9 km/h
- Travel score
- 5.1
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Nam Định in Fall
Over the season highs ease from about 31°C in early September to 24°C by late November.
A typical fall day in Nam Định reaches about 29°C and drops to 23°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Nam Định
Once humidity and wind are folded in, fall brings about 44 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.
Nam Định 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 | 20° / 15° | 28 | 5.5 | 10.9 | 6.6 |
| Feb | 22° / 17° | 15 | 4.1 | 11.3 | 6.9 |
| Mar | 24° / 19° | 36 | 6.4 | 11.9 | 7.0 |
| Apr | 28° / 23° | 63 | 8.7 | 12.5 | 6.0 |
| May | 31° / 26° | 196 | 16.3 | 13 | 3.6 |
| Jun | 33° / 28° | 189 | 16.4 | 13.2 | 2.6 |
| Jul | 33° / 28° | 246 | 18.4 | 13.1 | 2.6 |
| Aug | 32° / 27° | 342 | 23.6 | 12.7 | 2.6 |
| Sep | 31° / 25° | 277 | 20.6 | 12.1 | 3.3 |
| Oct | 29° / 23° | 142 | 13.6 | 11.5 | 5.1 |
| Nov | 26° / 20° | 61 | 8.3 | 11 | 6.9 |
| Dec | 22° / 16° | 29 | 6.3 | 10.8 | 7.1 |
Cloud cover in Fall
The sky is clear or mostly clear about 27% of the time across fall.
Chance of precipitation in Fall
Nam Định gets around 481 mm of rain over 43 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 9 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 24 min in early September to 10 h 54 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 4.0 kWh/m².
Hazard calendar for Nam Định
In fall, Nam Định overlaps its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.
Nam Định sits in the Pacific typhoon belt; the season peaks July–October.
Nam Định's monsoon runs May–September, when most of the year's rain falls.
Is fall a good time to visit Nam Định?
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 Nam Định for sightseeing.
What to pack for Nam Định in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Nam Định sees daytime highs around 29°C and nights near 23°C. Pack light clothes and rain gear. About 43 days see rain.
Sea temperature near Nam Định 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 40 km away) is warmest in August at about 30°C and coldest in February near 20°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) | 21 | 20 | 21 | 24 | 27 | 29 | 30 | 30 | 29 | 28 | 26 | 23 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Warm | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 21 | Refreshing |
| Feb | 20 | Refreshing |
| Mar | 21 | Refreshing |
| Apr | 24 | Refreshing |
| May | 27 | Warm |
| Jun | 29 | Tropical |
| Jul | 30 | Tropical |
| Aug | 30 | Tropical |
| Sep | 29 | Tropical |
| Oct | 28 | Tropical |
| Nov | 26 | Warm |
| Dec | 23 | Refreshing |
UV index in Nam Định 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 Nam Định peaks around July 12 at about 11 (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) | 7 | 8 | 9 | 7 | 9 | 11 | 11 | 10 | 8 | 8 | 7 | 6 |
| Level | High | Very high | Very high | 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 | 9 | Very high |
| Apr | 7 | High |
| May | 9 | Very high |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 10 | Very high |
| Sep | 8 | Very high |
| Oct | 8 | Very high |
| Nov | 7 | High |
| Dec | 6 | High |
Air quality in Nam Định 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 Nam Định is worst in January — around 67 µg/m³ PM2.5 (unhealthy), about 2.7× the cleanest month (July, 25 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) | 67 | 61 | 61 | 51 | 37 | 27 | 25 | 27 | 41 | 52 | 56 | 66 |
| Level | Unhealthy | Unhealthy | Unhealthy | Poor | Poor | Moderate | Moderate | Moderate | Poor | Poor | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 67 | Unhealthy |
| Feb | 61 | Unhealthy |
| Mar | 61 | Unhealthy |
| Apr | 51 | Poor |
| May | 37 | Poor |
| Jun | 27 | Moderate |
| Jul | 25 | Moderate |
| Aug | 27 | Moderate |
| Sep | 41 | Poor |
| Oct | 52 | Poor |
| Nov | 56 | Unhealthy |
| Dec | 66 | Unhealthy |
Where is Nam Định?
Nam Định sits at 20.4°N, 106.2°E, 5 m above sea level, in Vietnam. The nearest listed city is Thái Bình, 17 km away.
Topography around Nam Định
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nam Định.
Within 3 km, the terrain around Nam Định has only modest variations in elevation — a maximum elevation change of 14 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 63 m; within 80 km, large variations in elevation — a maximum elevation change of 1,061 m.
The land around Nam Định is covered by artificial surfaces (53%) within 3 km, cropland (59%) within 16 km, and cropland (36%), water (28%) and trees (23%) 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 Nam Định (20.4339°, 106.1773°, 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.