Donghae City in Summer
In summer (June, July and August), Donghae City sees average daytime highs around 25°C and overnight lows near 19°C, with 519 mm of rain over about 38 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Over the season highs climb from about 23°C in early June to 25°C by late August. The sky is clear or mostly clear about 22% of the time across summer, and the air most often feels muggy.
Summer is Donghae City's best season of the year to visit on our travel score. For the whole year in context, see Donghae City's year-round climate.
- Avg daytime high
- 25°C
- warmest season of the year
- Avg overnight low
- 19°C
- Rainfall
- 519 mm
- 38 wet days
- Avg wind
- 8 km/h
- Travel score
- 6.1
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Donghae City in Summer
Over the season highs climb from about 23°C in early June to 25°C by late August.
A typical summer day in Donghae City reaches about 25°C and drops to 19°C overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Donghae City
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Donghae City 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 | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 2° / -6° | 45 | 5.8 | 5 | 9.7 | 0.0 |
| Feb | 4° / -5° | 44 | 5.7 | 4.6 | 10.6 | 0.1 |
| Mar | 9° / 0° | 68 | 8.6 | 4.8 | 11.7 | 2.0 |
| Apr | 16° / 6° | 75 | 8.4 | 0.8 | 12.9 | 5.1 |
| May | 21° / 12° | 75 | 7.8 | 0 | 14 | 6.7 |
| Jun | 23° / 16° | 107 | 9.6 | 0 | 14.5 | 6.8 |
| Jul | 26° / 20° | 197 | 13.4 | 0 | 14.3 | 5.9 |
| Aug | 26° / 21° | 215 | 15.4 | 0 | 13.4 | 5.7 |
| Sep | 22° / 16° | 185 | 11.6 | 0 | 12.3 | 6.3 |
| Oct | 18° / 9° | 82 | 8 | 0 | 11 | 6.1 |
| Nov | 11° / 3° | 61 | 7.3 | 0.7 | 10 | 3.1 |
| Dec | 5° / -3° | 35 | 5 | 2.7 | 9.5 | 0.2 |
Cloud cover in Summer
The sky is clear or mostly clear about 22% of the time across summer.
Chance of precipitation in Summer
Donghae City gets around 519 mm of rain over 38 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels muggy — 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 14 h 24 min in early June to 12 h 54 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 5.1 kWh/m².
Hazard calendar for Donghae City
In summer, Donghae City overlaps its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.
Donghae City sits in the Pacific typhoon belt; the season peaks July–October.
Donghae City's rainy season runs June–September, when most of the year's rain falls.
Is summer a good time to visit Donghae City?
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 reasonable time to visit Donghae City for sightseeing.
What to pack for Donghae City in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Donghae City sees daytime highs around 25°C and nights near 19°C. Pack rain gear. Worth having: light clothes and sun protection. About 38 days see rain.
Sea temperature near Donghae City in Summer
The nearest coast averages about 21°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in August at about 24°C and coldest in February near 10°C.
It's comfortable for a long swim from Jul 1 to Oct 11 — about 3.4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 11 | 10 | 10 | 12 | 15 | 18 | 22 | 24 | 22 | 20 | 16 | 14 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Warm | Refreshing | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 11 | Bracing |
| Feb | 10 | Bracing |
| Mar | 10 | Bracing |
| Apr | 12 | Bracing |
| May | 15 | Bracing |
| Jun | 18 | Cool |
| Jul | 22 | Refreshing |
| Aug | 24 | Warm |
| Sep | 22 | Refreshing |
| Oct | 20 | Cool |
| Nov | 16 | Cool |
| Dec | 14 | Bracing |
UV index in Donghae City in Summer
Clear-sky midday UV across summer averages around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Donghae City peaks around August 16 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 4 | 6 | 7 | 7 | 8 | 9 | 8 | 5 | 3 | 2 |
| Level | Low | Moderate | Moderate | High | High | High | Very high | Very high | Very high | High | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 7 | High |
| Jun | 7 | High |
| Jul | 8 | Very high |
| Aug | 9 | Very high |
| Sep | 8 | Very high |
| Oct | 5 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Air quality in Donghae City 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 Donghae City is worst in March — around 40 µg/m³ PM2.5 (poor), about 2.4× the cleanest month (September, 17 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) | 26 | 30 | 40 | 38 | 35 | 30 | 24 | 21 | 17 | 20 | 24 | 22 |
| Level | Moderate | Moderate | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 26 | Moderate |
| Feb | 30 | Moderate |
| Mar | 40 | Poor |
| Apr | 38 | Poor |
| May | 35 | Moderate |
| Jun | 30 | Moderate |
| Jul | 24 | Moderate |
| Aug | 21 | Moderate |
| Sep | 17 | Moderate |
| Oct | 20 | Moderate |
| Nov | 24 | Moderate |
| Dec | 22 | Moderate |
Where is Donghae City?
Donghae City sits at 37.5°N, 129.1°E, 24 m above sea level, in South Korea. The nearest listed city is Santyoku, 13 km away.
Topography around Donghae City
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Donghae City.
Within 3 km, the terrain around Donghae City has significant variations in elevation — a maximum elevation change of 358 m around an average of 72 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,347 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,550 m.
The land around Donghae City is covered by trees (47%) and water (30%) within 3 km, water (47%) and trees (44%) within 16 km, and trees (62%) and water (33%) within 80 km.
South Korea travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / F
- 220 V · 60 Hz
- Prices
- ≈ 57% of US
- price level, 2025
- GDP per capita
- $36,227
- 2025
- Happiness
- 6.0 / 10
- World Happiness, 2025
- Safe drinking water
- 99%
- of population, 2024
- Homicide rate
- 0.5
- per 100k, 2023
- Road deaths
- 8.6
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 522
- 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 Donghae City (37.5439°, 129.1069°, 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.