Hải Dương in Summer
In summer (June, July and August), Hải Dương sees average daytime highs around 33°C and overnight lows near 27°C, with 875 mm of rain over about 68 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 Hải Dương's weakest season of the year to visit on our travel score. For the whole year in context, see Hải Dương's year-round climate.
- Avg daytime high
- 33°C
- warmest season of the year
- Avg overnight low
- 27°C
- Rainfall
- 875 mm
- 68 wet days
- Avg wind
- 8 km/h
- Travel score
- 2.4
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Hải Dương in Summer
Across summer, daytime highs hold fairly steady around 33°C.
A typical summer day in Hải Dương 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 Hải Dương
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.
Hải Dương 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° / 14° | 36 | 7 | 10.9 | 6.3 |
| Feb | 22° / 16° | 24 | 6.6 | 11.3 | 6.5 |
| Mar | 24° / 19° | 50 | 9.9 | 11.9 | 6.5 |
| Apr | 28° / 22° | 82 | 11.3 | 12.5 | 5.4 |
| May | 31° / 25° | 244 | 18.7 | 13 | 3.3 |
| Jun | 33° / 27° | 246 | 20.4 | 13.2 | 2.4 |
| Jul | 33° / 27° | 276 | 22.5 | 13.1 | 2.3 |
| Aug | 32° / 26° | 353 | 25.3 | 12.7 | 2.4 |
| Sep | 31° / 25° | 244 | 19.9 | 12.1 | 3.2 |
| Oct | 29° / 23° | 119 | 12.6 | 11.5 | 5.2 |
| Nov | 26° / 19° | 60 | 7.4 | 11 | 7.0 |
| Dec | 22° / 16° | 34 | 6.7 | 10.8 | 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
Hải Dương gets around 875 mm of rain over 68 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 8 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 4.8 kWh/m².
Hazard calendar for Hải Dương
In summer, Hải Dương overlaps its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.
Hải Dương sits in the Pacific typhoon belt; the season peaks July–October.
Hải Dương's monsoon runs May–September, when most of the year's rain falls.
Is summer a good time to visit Hải Dương?
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 Hải Dương.
What to pack for Hải Dương in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Hải Dương sees daytime highs around 33°C and nights near 27°C. Pack light clothes and rain gear. Worth having: sun protection. About 68 days see rain.
Sea temperature near Hải Dương in Summer
The nearest coast averages about 30°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 46 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 Hải Dương 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 Hải Dương peaks around July 10 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 | 9 | 7 | 9 | 11 | 12 | 7 | 8 | 8 | 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 | 9 | Very high |
| Apr | 7 | Very high |
| May | 9 | Very high |
| Jun | 11 | Extreme |
| Jul | 12 | Extreme |
| Aug | 7 | Very high |
| Sep | 8 | Very high |
| Oct | 8 | Very high |
| Nov | 7 | High |
| Dec | 6 | High |
Air quality in Hải Dương 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 Hải Dương 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 Hải Dương?
Hải Dương sits at 20.9°N, 106.3°E, 8 m above sea level, in Vietnam. The nearest listed city is Chí Linh, 14 km away.
Topography around Hải Dương
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Hải Dương.
Within 3 km, the terrain around Hải Dương 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 141 m; within 80 km, large variations in elevation — a maximum elevation change of 1,005 m.
The land around Hải Dương is covered by artificial surfaces (48%) within 3 km, cropland (46%) and trees (24%) within 16 km, and trees (37%) 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 Hải Dương (20.941°, 106.333°, elevation 8 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.