Sunan in Summer
In summer (June, July and August), Sunan sees average daytime highs around 28°C and overnight lows near 20°C, with 656 mm of rain over about 41 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 25°C in early June to 28°C by late August. The sky is clear or mostly clear about 24% of the time across summer, and the air most often feels muggy.
Summer is Sunan's best season of the year to visit on our travel score. For the whole year in context, see Sunan's year-round climate.
- Avg daytime high
- 28°C
- warmest season of the year
- Avg overnight low
- 20°C
- Rainfall
- 656 mm
- 41 wet days
- Avg wind
- 9 km/h
- Travel score
- 5.5
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Sunan in Summer
Over the season highs climb from about 25°C in early June to 28°C by late August.
A typical summer day in Sunan reaches about 28°C and drops to 20°C overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Sunan
Once humidity and wind are folded in, summer brings about 20 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.
Sunan 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° / -10° | 13 | 3 | 2.8 | 9.6 | 0.0 |
| Feb | 3° / -6° | 21 | 3.7 | 2.4 | 10.5 | 0.0 |
| Mar | 9° / -1° | 29 | 5 | 1.4 | 11.7 | 2.2 |
| Apr | 17° / 6° | 57 | 6.7 | 0.2 | 13 | 5.8 |
| May | 23° / 12° | 101 | 8.2 | 0 | 14.1 | 7.1 |
| Jun | 27° / 17° | 117 | 10.3 | 0 | 14.7 | 6.5 |
| Jul | 28° / 21° | 294 | 16.4 | 0 | 14.5 | 4.9 |
| Aug | 29° / 21° | 244 | 14 | 0 | 13.5 | 5.1 |
| Sep | 25° / 16° | 100 | 6.9 | 0 | 12.3 | 7.3 |
| Oct | 19° / 8° | 50 | 6.2 | 0 | 11 | 6.6 |
| Nov | 9° / 1° | 51 | 7.4 | 0.8 | 9.9 | 2.2 |
| Dec | 1° / -7° | 25 | 5.5 | 3.3 | 9.3 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 24% of the time across summer.
Chance of precipitation in Summer
Sunan gets around 656 mm of rain over 41 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 9 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 30 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 4.8 kWh/m².
Hazard calendar for Sunan
In summer, Sunan overlaps its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.
Sunan sits in the Pacific typhoon belt; the season peaks July–October.
Sunan's rainy season runs July–August, when most of the year's rain falls.
Is summer a good time to visit Sunan?
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 Sunan for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Sunan in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Sunan sees daytime highs around 28°C and nights near 20°C. Pack light clothes and rain gear. Worth having: sun protection. About 41 days see rain.
Sea temperature near Sunan 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 33 km away) is warmest in August at about 25°C and coldest in February near -0°C.
It's comfortable for a long swim from Jul 3 to Oct 2 — about 3 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 2 | 0 | 2 | 7 | 13 | 18 | 22 | 25 | 23 | 18 | 12 | 6 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Warm | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 2 | Bracing |
| Feb | 0 | Bracing |
| Mar | 2 | Bracing |
| Apr | 7 | Bracing |
| May | 13 | Bracing |
| Jun | 18 | Cool |
| Jul | 22 | Refreshing |
| Aug | 25 | Warm |
| Sep | 23 | Refreshing |
| Oct | 18 | Cool |
| Nov | 12 | Bracing |
| Dec | 6 | Bracing |
UV index in Sunan 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 Sunan peaks around August 16 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 20 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 | 2 | 3 | 6 | 7 | 6 | 7 | 8 | 7 | 4 | 2 | 2 |
| Level | Low | Moderate | Moderate | High | High | High | High | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 2 | Moderate |
| Mar | 3 | Moderate |
| Apr | 6 | High |
| May | 7 | High |
| Jun | 6 | High |
| Jul | 7 | High |
| Aug | 8 | Very high |
| Sep | 7 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Moderate |
| Dec | 2 | Low |
Air quality in Sunan 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 Sunan is worst in January — around 201 µg/m³ PM2.5 (very unhealthy), about 2.0× the cleanest month (July, 102 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) | 201 | 171 | 180 | 150 | 132 | 124 | 102 | 107 | 152 | 182 | 195 | 181 |
| Level | Very unhealthy | Very unhealthy | Very unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Very unhealthy | Very unhealthy | Very unhealthy | Very unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 201 | Very unhealthy |
| Feb | 171 | Very unhealthy |
| Mar | 180 | Very unhealthy |
| Apr | 150 | Unhealthy |
| May | 132 | Unhealthy |
| Jun | 124 | Unhealthy |
| Jul | 102 | Unhealthy |
| Aug | 107 | Unhealthy |
| Sep | 152 | Very unhealthy |
| Oct | 182 | Very unhealthy |
| Nov | 195 | Very unhealthy |
| Dec | 181 | Very unhealthy |
Where is Sunan?
Sunan sits at 39.2°N, 125.7°E, 37 m above sea level, in North Korea. The nearest listed city is P’yŏngsŏng, 16 km away.
Topography around Sunan
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sunan.
Within 3 km, the terrain around Sunan has only modest variations in elevation — a maximum elevation change of 72 m around an average of 33 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 546 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,229 m.
The land around Sunan is covered by cropland (68%) within 3 km, cropland (52%) and trees (35%) within 16 km, and cropland (38%), trees (34%) and water (20%) 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 Sunan (39.2032°, 125.6931°, elevation 37 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.