Kosan in Summer
In summer (June, July and August), Kosan sees average daytime highs around 25°C and overnight lows near 17°C, with 642 mm of rain over about 46 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 25°C. The sky is clear or mostly clear about 17% of the time across summer, and the air most often feels humid.
Summer is Kosan's best season of the year to visit on our travel score. For the whole year in context, see Kosan's year-round climate.
- Avg daytime high
- 25°C
- warmest season of the year
- Avg overnight low
- 17°C
- Rainfall
- 642 mm
- 46 wet days
- Avg wind
- 8 km/h
- Travel score
- 5.8
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Kosan in Summer
Across summer, daytime highs hold fairly steady around 25°C.
A typical summer day in Kosan reaches about 25°C and drops to 17°C overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Kosan
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.
Kosan 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° / -14° | 25 | 4.6 | 5.4 | 9.6 | 0.0 |
| Feb | 1° / -11° | 30 | 4.9 | 4.9 | 10.5 | 0.0 |
| Mar | 7° / -4° | 44 | 7.3 | 5.4 | 11.7 | 1.0 |
| Apr | 14° / 2° | 72 | 8 | 2 | 13 | 4.4 |
| May | 20° / 9° | 104 | 9.5 | 0 | 14.1 | 6.4 |
| Jun | 23° / 14° | 125 | 11.5 | 0 | 14.7 | 6.4 |
| Jul | 25° / 18° | 267 | 17.8 | 0 | 14.4 | 5.4 |
| Aug | 26° / 18° | 249 | 16.7 | 0 | 13.5 | 5.6 |
| Sep | 22° / 12° | 125 | 8.8 | 0 | 12.3 | 6.6 |
| Oct | 16° / 5° | 53 | 6.2 | 0.2 | 11 | 5.6 |
| Nov | 7° / -2° | 50 | 7.6 | 3.2 | 9.9 | 1.3 |
| Dec | 0° / -10° | 30 | 5.1 | 4.9 | 9.3 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 17% of the time across summer.
Chance of precipitation in Summer
Kosan gets around 642 mm of rain over 46 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — 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 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 4.6 kWh/m².
Hazard calendar for Kosan
In summer, Kosan overlaps its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.
Kosan sits in the Pacific typhoon belt; the season peaks July–October.
Kosan's rainy season runs June–September, when most of the year's rain falls.
Is summer a good time to visit Kosan?
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 Kosan for sightseeing.
What to pack for Kosan in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Kosan sees daytime highs around 25°C and nights near 17°C. Pack rain gear. Worth having: light clothes and sun protection. About 46 days see rain.
Sea temperature near Kosan in Summer
The nearest coast averages about 22°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 35 km away) is warmest in August at about 24°C and coldest in February near 4°C.
It's comfortable for a long swim from Jul 1 to Sep 30 — 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) | 5 | 4 | 5 | 8 | 13 | 18 | 22 | 24 | 22 | 18 | 13 | 9 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Warm | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 5 | Bracing |
| Feb | 4 | Bracing |
| Mar | 5 | Bracing |
| Apr | 8 | Bracing |
| May | 13 | Bracing |
| Jun | 18 | Cool |
| Jul | 22 | Refreshing |
| Aug | 24 | Warm |
| Sep | 22 | Refreshing |
| Oct | 18 | Cool |
| Nov | 13 | Bracing |
| Dec | 9 | Bracing |
UV index in Kosan in Summer
Clear-sky midday UV across summer averages around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Kosan peaks around August 18 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 4 | 6 | 6 | 8 | 7 | 9 | 7 | 5 | 2 | 2 |
| Level | Low | Moderate | Moderate | High | High | Very high | High | Very high | Very high | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 6 | High |
| Jun | 8 | Very high |
| Jul | 7 | High |
| Aug | 9 | Very high |
| Sep | 7 | Very high |
| Oct | 5 | Moderate |
| Nov | 2 | Moderate |
| Dec | 2 | Low |
Air quality in Kosan 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 Kosan is worst in March — around 67 µg/m³ PM2.5 (unhealthy), about 2.4× the cleanest month (July, 28 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) | 66 | 63 | 67 | 59 | 47 | 36 | 28 | 28 | 34 | 49 | 53 | 52 |
| Level | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor | Poor | Moderate | Moderate | Moderate | Poor | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 66 | Unhealthy |
| Feb | 63 | Unhealthy |
| Mar | 67 | Unhealthy |
| Apr | 59 | Unhealthy |
| May | 47 | Poor |
| Jun | 36 | Poor |
| Jul | 28 | Moderate |
| Aug | 28 | Moderate |
| Sep | 34 | Moderate |
| Oct | 49 | Poor |
| Nov | 53 | Poor |
| Dec | 52 | Poor |
Where is Kosan?
Kosan sits at 38.9°N, 127.4°E, 195 m above sea level, in North Korea. The nearest listed city is Hoeyang, 22 km away.
Topography around Kosan
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Kosan.
Within 3 km, the terrain around Kosan has significant variations in elevation — a maximum elevation change of 366 m around an average of 215 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,492 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,626 m.
The land around Kosan is covered by cropland (54%) and trees (24%) within 3 km, trees (75%) within 16 km, and trees (58%) 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 Kosan (38.8558°, 127.4181°, elevation 195 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.