Haeju in Summer
In summer (June, July and August), Haeju sees average daytime highs around 26°C and overnight lows near 21°C, with 617 mm of rain over about 36 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 22°C in early June to 27°C by late August. The sky is clear or mostly clear about 27% of the time across summer, and the air most often feels muggy.
Summer is Haeju's best season of the year to visit on our travel score. For the whole year in context, see Haeju's year-round climate.
- Avg daytime high
- 26°C
- warmest season of the year
- Avg overnight low
- 21°C
- Rainfall
- 617 mm
- 36 wet days
- Avg wind
- 10 km/h
- Travel score
- 6.2
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Haeju in Summer
Over the season highs climb from about 22°C in early June to 27°C by late August.
A typical summer day in Haeju reaches about 26°C and drops to 21°C overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Haeju
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.
Haeju 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 | 1° / -6° | 15 | 3.2 | 2.2 | 9.7 | 0.0 |
| Feb | 3° / -4° | 20 | 3.4 | 1.5 | 10.5 | 0.0 |
| Mar | 8° / 1° | 29 | 4.9 | 0.8 | 11.7 | 1.5 |
| Apr | 14° / 7° | 55 | 6.9 | 0 | 13 | 4.5 |
| May | 19° / 12° | 92 | 7.6 | 0 | 14 | 6.6 |
| Jun | 24° / 18° | 105 | 8.3 | 0 | 14.6 | 7.0 |
| Jul | 26° / 22° | 271 | 14.4 | 0 | 14.4 | 5.8 |
| Aug | 28° / 22° | 241 | 13.3 | 0 | 13.5 | 5.8 |
| Sep | 24° / 17° | 97 | 6.8 | 0 | 12.3 | 7.4 |
| Oct | 18° / 11° | 43 | 4.9 | 0 | 11 | 6.7 |
| Nov | 10° / 3° | 43 | 6.4 | 0.4 | 9.9 | 2.7 |
| Dec | 3° / -3° | 19 | 4.3 | 1.4 | 9.4 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 27% of the time across summer.
Chance of precipitation in Summer
Haeju gets around 617 mm of rain over 36 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 10 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 5.0 kWh/m².
Hazard calendar for Haeju
In summer, Haeju overlaps its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.
Haeju sits in the Pacific typhoon belt; the season peaks July–October.
Haeju's rainy season runs July–August, when most of the year's rain falls.
Is summer a good time to visit Haeju?
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 Haeju for sightseeing.
What to pack for Haeju in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Haeju sees daytime highs around 26°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 36 days see rain.
Sea temperature near Haeju 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 at the nearest coast (about 20 km away) is warmest in August at about 25°C and coldest in February near 2°C.
It's comfortable for a long swim from Jul 4 to Oct 5 — about 3.1 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 4 | 2 | 5 | 9 | 13 | 18 | 22 | 25 | 23 | 18 | 13 | 8 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Warm | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 4 | Bracing |
| Feb | 2 | Bracing |
| Mar | 5 | Bracing |
| Apr | 9 | Bracing |
| May | 13 | Bracing |
| Jun | 18 | Cool |
| Jul | 22 | Refreshing |
| Aug | 25 | Warm |
| Sep | 23 | Refreshing |
| Oct | 18 | Cool |
| Nov | 13 | Bracing |
| Dec | 8 | Bracing |
UV index in Haeju in Summer
Clear-sky midday UV across summer averages around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Haeju peaks around July 23 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 21 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 | 6 | 8 | 8 | 7 | 5 | 3 | 2 |
| Level | Low | Moderate | Moderate | High | Very high | High | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 7 | Very high |
| Jun | 6 | High |
| Jul | 8 | Very high |
| Aug | 8 | Very high |
| Sep | 7 | High |
| Oct | 5 | Moderate |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Air quality in Haeju 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 Haeju is worst in November — around 130 µg/m³ PM2.5 (unhealthy), about 2.3× the cleanest month (July, 58 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) | 122 | 117 | 121 | 95 | 79 | 69 | 58 | 62 | 90 | 115 | 130 | 122 |
| Level | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 122 | Unhealthy |
| Feb | 117 | Unhealthy |
| Mar | 121 | Unhealthy |
| Apr | 95 | Unhealthy |
| May | 79 | Unhealthy |
| Jun | 69 | Unhealthy |
| Jul | 58 | Unhealthy |
| Aug | 62 | Unhealthy |
| Sep | 90 | Unhealthy |
| Oct | 115 | Unhealthy |
| Nov | 130 | Unhealthy |
| Dec | 122 | Unhealthy |
Where is Haeju?
Haeju sits at 38.0°N, 125.7°E, 57 m above sea level, in North Korea. The nearest listed city is Ch’ŏngdan-ŭp, 21 km away.
Topography around Haeju
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Haeju.
Within 3 km, the terrain around Haeju has significant variations in elevation — a maximum elevation change of 519 m around an average of 99 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 906 m; within 80 km, large variations in elevation — a maximum elevation change of 1,037 m.
The land around Haeju is covered by artificial surfaces (31%), trees (23%) and grassland (22%) within 3 km, cropland (39%) and trees (26%) within 16 km, and water (36%), cropland (34%) and trees (24%) within 80 km.
North Korea travel facts
- Travel advisory
- Level 4
- Do Not Travel
- Power plugs
- Type C / F
- 220 V · 50 Hz
- Safe drinking water
- 67%
- of population, 2023
- Road deaths
- 24.2
- per 100k/yr, 2019
- Income group
- Low
- World Bank
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 Haeju (38.0406°, 125.7147°, elevation 57 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.