Cửa Nam in Summer
In summer (June, July and August), Cửa Nam sees average daytime highs around 33°C and overnight lows near 27°C, with 798 mm of rain over about 61 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 33°C. The sky is clear or mostly clear about 7% of the time across summer, and the air most often feels miserable.
Summer is Cửa Nam's weakest season of the year to visit on our travel score. For the whole year in context, see Cửa Nam's year-round climate.
- Avg daytime high
- 33°C
- warmest season of the year
- Avg overnight low
- 27°C
- Rainfall
- 798 mm
- 61 wet days
- Avg wind
- 7 km/h
- Travel score
- 2.4
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Cửa Nam in Summer
Across summer, daytime highs hold fairly steady around 33°C.
A typical summer day in Cửa Nam reaches about 33°C and drops to 27°C overnight. The warmest of the three months is June, the coolest August.
How summer really feels in Cửa Nam
Once humidity and wind are folded in, summer brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Cửa Nam weather by month
How the three summer months (June, July and August) 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° | 40 | 7.7 | 10.9 | 6.3 |
| Feb | 22° / 16° | 26 | 6.7 | 11.3 | 6.6 |
| Mar | 25° / 19° | 52 | 9.6 | 11.9 | 6.5 |
| Apr | 29° / 22° | 100 | 11.1 | 12.5 | 5.2 |
| May | 32° / 25° | 232 | 17.5 | 13 | 3.3 |
| Jun | 33° / 27° | 226 | 18.3 | 13.3 | 2.4 |
| Jul | 33° / 27° | 259 | 20.4 | 13.1 | 2.4 |
| Aug | 33° / 26° | 314 | 22.5 | 12.7 | 2.5 |
| Sep | 32° / 25° | 226 | 18.7 | 12.1 | 3.3 |
| Oct | 29° / 23° | 121 | 11.9 | 11.5 | 5.2 |
| Nov | 26° / 19° | 57 | 7.3 | 11 | 7.1 |
| Dec | 22° / 16° | 33 | 6.6 | 10.7 | 7.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 7% of the time across summer.
Chance of precipitation in Summer
Cửa Nam gets around 798 mm of rain over 61 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 7 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 12 min in early June to 12 h 24 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 4.7 kWh/m².
Hazard calendar for Cửa Nam
In summer, Cửa Nam overlaps its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.
Cửa Nam sits in the Pacific typhoon belt; the season peaks July–October.
Cửa Nam's monsoon runs May–September, when most of the year's rain falls.
Is summer a good time to visit Cửa Nam?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Cửa Nam.
What to pack for Cửa Nam in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Cửa Nam sees daytime highs around 33°C and nights near 27°C. Pack light clothes and rain gear. Worth having: sun protection. About 61 days see rain.
UV index in Cửa Nam in Summer
Clear-sky midday UV across summer 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 Cửa Nam peaks around June 20 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 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) | 6 | 7 | 9 | 6 | 8 | 11 | 10 | 9 | 8 | 8 | 6 | 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 | 6 | High |
| Feb | 7 | Very high |
| Mar | 9 | Very high |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 11 | Extreme |
| Jul | 10 | Extreme |
| Aug | 9 | Very high |
| Sep | 8 | Very high |
| Oct | 8 | Very high |
| Nov | 6 | High |
| Dec | 6 | High |
Air quality in Cửa Nam in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Cửa Nam is worst in December — around 171 µg/m³ PM2.5 (very unhealthy), about 3.4× the cleanest month (July, 50 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) | 161 | 136 | 122 | 106 | 76 | 59 | 50 | 68 | 96 | 125 | 152 | 171 |
| Level | Very unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor | Unhealthy | Unhealthy | Unhealthy | Very unhealthy | Very unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 161 | Very unhealthy |
| Feb | 136 | Unhealthy |
| Mar | 122 | Unhealthy |
| Apr | 106 | Unhealthy |
| May | 76 | Unhealthy |
| Jun | 59 | Unhealthy |
| Jul | 50 | Poor |
| Aug | 68 | Unhealthy |
| Sep | 96 | Unhealthy |
| Oct | 125 | Unhealthy |
| Nov | 152 | Very unhealthy |
| Dec | 171 | Very unhealthy |
Where is Cửa Nam?
Cửa Nam sits at 21.0°N, 105.9°E, 24 m above sea level, in Vietnam. The nearest listed city is Hoàn Kiếm, 1.0 km away.
Topography around Cửa Nam
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Cửa Nam.
Within 3 km, the terrain around Cửa Nam has only modest variations in elevation — a maximum elevation change of 24 m around an average of 14 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 36 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,720 m.
The land around Cửa Nam is covered by artificial surfaces (67%) within 3 km, artificial surfaces (38%), trees (27%) and cropland (22%) within 16 km, and trees (52%) and cropland (34%) 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 Cửa Nam (21.0211°, 105.8523°, elevation 24 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.