Sunan in Spring
In spring (March, April and May), Sunan sees average daytime highs around 16°C and overnight lows near 5°C, with 187 mm of precipitation over about 20 wet days across the season. It is the 3rd-warmest season and the 3rd-wettest season.
Over the season highs climb from about 6°C in early March to 25°C by late May. The sky is clear or mostly clear about 44% of the time across spring, and the air most often feels dry.
Spring is Sunan's 3rd-best season to visit on our travel score. For the whole year in context, see Sunan's year-round climate.
- Avg daytime high
- 16°C
- 3rd-warmest season
- Avg overnight low
- 5°C
- Precipitation
- 187 mm
- 20 wet days
- Avg wind
- 11 km/h
- Travel score
- 5.0
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Sunan in Spring
Over the season highs climb from about 6°C in early March to 25°C by late May.
A typical spring day in Sunan reaches about 16°C and drops to 5°C overnight. The warmest of the three months is May, the coolest March.
How spring really feels in Sunan
Once humidity and wind are folded in, spring brings about 0 days that feel above 32°C and 35 that feel at or below 0°C.
The story in spring is cold — wind chill drags the overnight "feels like" below the raw low.
Sunan weather by month
How the three spring months (March, April and May) 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 Spring
The sky is clear or mostly clear about 44% of the time across spring.
Chance of precipitation in Spring
Sunan gets around 187 mm of rain and snow over 20 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 11 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 hours in early March to 14 h 30 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 5.3 kWh/m².
Hazard calendar for Sunan
In spring, Sunan overlaps its pacific typhoon 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 spring a good time to visit Sunan?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a reasonable time to visit Sunan for sightseeing.
What to pack for Sunan in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Sunan sees daytime highs around 16°C and nights near 5°C. Pack a warm layer. Worth having: light clothes, rain gear and sun protection. About 20 days see rain.
Sea temperature near Sunan in Spring
The nearest coast averages about 7°C across spring — 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 Spring
Clear-sky midday UV across spring averages around 5 — 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 Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring 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.