Wŏnju in Summer
In summer (June, July and August), Wŏnju sees average daytime highs around 27°C and overnight lows near 19°C, with 642 mm of rain over about 43 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 27°C. The sky is clear or mostly clear about 19% of the time across summer, and the air most often feels muggy.
Summer is Wŏnju's best season of the year to visit on our travel score. For the whole year in context, see Wŏnju's year-round climate.
- Avg daytime high
- 27°C
- warmest season of the year
- Avg overnight low
- 19°C
- Rainfall
- 642 mm
- 43 wet days
- Avg wind
- 7 km/h
- Travel score
- 5.6
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Wŏnju in Summer
Across summer, daytime highs hold fairly steady around 27°C.
A typical summer day in Wŏnju reaches about 27°C and drops to 19°C overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Wŏnju
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.
Wŏnju 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° / -8° | 24 | 4.5 | 3.7 | 9.7 | 0.0 |
| Feb | 4° / -5° | 33 | 4.6 | 2.9 | 10.6 | 0.2 |
| Mar | 10° / -0° | 54 | 7.8 | 2.8 | 11.7 | 2.6 |
| Apr | 17° / 5° | 88 | 8.1 | 0.2 | 12.9 | 5.7 |
| May | 22° / 11° | 102 | 9 | 0 | 14 | 6.9 |
| Jun | 26° / 16° | 129 | 9.4 | 0 | 14.5 | 6.6 |
| Jul | 28° / 20° | 286 | 17.4 | 0 | 14.3 | 5.0 |
| Aug | 28° / 21° | 228 | 15.9 | 0 | 13.4 | 5.1 |
| Sep | 24° / 15° | 131 | 8.7 | 0 | 12.3 | 6.9 |
| Oct | 19° / 8° | 58 | 5.8 | 0 | 11 | 6.7 |
| Nov | 11° / 1° | 47 | 7.2 | 0.7 | 10 | 2.9 |
| Dec | 4° / -5° | 28 | 5.5 | 3.1 | 9.5 | 0.1 |
Cloud cover in Summer
The sky is clear or mostly clear about 19% of the time across summer.
Chance of precipitation in Summer
Wŏnju gets around 642 mm of rain over 43 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 7 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 4.6 kWh/m².
Hazard calendar for Wŏnju
In summer, Wŏnju overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Wŏnju's rainy season runs June–September, when most of the year's rain falls.
Is summer a good time to visit Wŏnju?
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 Wŏnju for sightseeing.
What to pack for Wŏnju in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Wŏnju sees daytime highs around 27°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 43 days see rain.
UV index in Wŏnju 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 Wŏnju peaks around August 14 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 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 6 | 7 | 7 | 8 | 9 | 8 | 5 | 3 | 2 |
| Level | Low | Moderate | Moderate | High | High | Very high | Very high | Very high | Very high | High | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| Apr | 6 | High |
| May | 7 | High |
| Jun | 7 | Very 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 Wŏnju 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 Wŏnju is worst in March — around 57 µg/m³ PM2.5 (unhealthy), about 1.8× the cleanest month (August, 31 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) | 48 | 49 | 57 | 51 | 46 | 41 | 33 | 31 | 32 | 41 | 46 | 43 |
| Level | Poor | Poor | Unhealthy | Poor | Poor | Poor | Moderate | Moderate | Moderate | Poor | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 48 | Poor |
| Feb | 49 | Poor |
| Mar | 57 | Unhealthy |
| Apr | 51 | Poor |
| May | 46 | Poor |
| Jun | 41 | Poor |
| Jul | 33 | Moderate |
| Aug | 31 | Moderate |
| Sep | 32 | Moderate |
| Oct | 41 | Poor |
| Nov | 46 | Poor |
| Dec | 43 | Poor |
Where is Wŏnju?
Wŏnju sits at 37.4°N, 127.9°E, 133 m above sea level, in South Korea. The nearest listed city is Yeoju, 28 km away.
Topography around Wŏnju
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Wŏnju.
Within 3 km, the terrain around Wŏnju has only modest variations in elevation — a maximum elevation change of 224 m around an average of 153 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,209 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,541 m.
The land around Wŏnju is covered by artificial surfaces (51%) and trees (33%) within 3 km, trees (78%) within 16 km, and trees (82%) 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 Wŏnju (37.3514°, 127.9453°, elevation 133 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.