Santyoku in Summer
In summer (June, July and August), Santyoku sees average daytime highs around 23°C and overnight lows near 21°C, with 451 mm of rain over about 33 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 20°C in early June to 24°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 Santyoku's best season of the year to visit on our travel score. For the whole year in context, see Santyoku's year-round climate.
- Avg daytime high
- 23°C
- warmest season of the year
- Avg overnight low
- 21°C
- Rainfall
- 451 mm
- 33 wet days
- Avg wind
- 12 km/h
- Travel score
- 6.5
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Santyoku in Summer
Over the season highs climb from about 20°C in early June to 24°C by late August.
A typical summer day in Santyoku reaches about 23°C and drops to 21°C overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Santyoku
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.
Santyoku 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 | 4° / -0° | 52 | 7.1 | 4.3 | 9.7 | 0.0 |
| Feb | 6° / 1° | 48 | 6.8 | 3.8 | 10.6 | 0.3 |
| Mar | 9° / 4° | 63 | 8.6 | 3 | 11.7 | 2.0 |
| Apr | 14° / 9° | 72 | 7.7 | 0.4 | 12.9 | 4.4 |
| May | 18° / 14° | 76 | 7.3 | 0 | 14 | 6.2 |
| Jun | 21° / 18° | 90 | 7.9 | 0 | 14.5 | 6.7 |
| Jul | 24° / 22° | 176 | 12.2 | 0 | 14.3 | 6.4 |
| Aug | 25° / 23° | 184 | 12.7 | 0 | 13.4 | 6.3 |
| Sep | 22° / 19° | 182 | 10.6 | 0 | 12.3 | 6.5 |
| Oct | 18° / 14° | 85 | 7.7 | 0 | 11 | 6.3 |
| Nov | 12° / 8° | 66 | 7.6 | 0.4 | 10 | 3.7 |
| Dec | 7° / 2° | 44 | 5.8 | 1.7 | 9.5 | 0.9 |
Cloud cover in Summer
The sky is clear or mostly clear about 27% of the time across summer.
Chance of precipitation in Summer
Santyoku gets around 451 mm of rain over 33 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 12 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 5.2 kWh/m².
Hazard calendar for Santyoku
In summer, Santyoku overlaps its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.
Santyoku sits in the Pacific typhoon belt; the season peaks July–October.
Santyoku's rainy season runs June–October, when most of the year's rain falls.
Is summer a good time to visit Santyoku?
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 Santyoku for sightseeing.
What to pack for Santyoku in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Santyoku sees daytime highs around 23°C and nights near 21°C. Worth packing: light clothes, rain gear and sun protection. About 33 days see rain.
Sea temperature near Santyoku 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 19 km away) is warmest in August at about 24°C and coldest in February near 11°C.
It's comfortable for a long swim from Jul 1 to Oct 17 — about 3.6 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 12 | 11 | 11 | 13 | 15 | 19 | 22 | 24 | 23 | 20 | 17 | 14 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Refreshing | Warm | Refreshing | Refreshing | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 12 | Bracing |
| Feb | 11 | Bracing |
| Mar | 11 | Bracing |
| Apr | 13 | Bracing |
| May | 15 | Cool |
| Jun | 19 | Cool |
| Jul | 22 | Refreshing |
| Aug | 24 | Warm |
| Sep | 23 | Refreshing |
| Oct | 20 | Refreshing |
| Nov | 17 | Cool |
| Dec | 14 | Bracing |
UV index in Santyoku 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 Santyoku peaks around August 16 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 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 | 7 | 8 | 9 | 8 | 5 | 3 | 2 |
| Level | Low | Moderate | Moderate | High | High | High | Very high | Very high | Very high | High | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 7 | High |
| Jun | 7 | 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 Santyoku 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 Santyoku is worst in March — around 40 µg/m³ PM2.5 (poor), about 2.4× the cleanest month (September, 17 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) | 26 | 30 | 40 | 38 | 35 | 30 | 24 | 21 | 17 | 20 | 24 | 22 |
| Level | Moderate | Moderate | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 26 | Moderate |
| Feb | 30 | Moderate |
| Mar | 40 | Poor |
| Apr | 38 | Poor |
| May | 35 | Moderate |
| Jun | 30 | Moderate |
| Jul | 24 | Moderate |
| Aug | 21 | Moderate |
| Sep | 17 | Moderate |
| Oct | 20 | Moderate |
| Nov | 24 | Moderate |
| Dec | 22 | Moderate |
Where is Santyoku?
Santyoku sits at 37.4°N, 129.2°E, 23 m above sea level, in South Korea. The nearest listed city is Donghae City, 13 km away.
Topography around Santyoku
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santyoku.
Within 3 km, the terrain around Santyoku has significant variations in elevation — a maximum elevation change of 265 m around an average of 50 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,347 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,549 m.
The land around Santyoku is covered by trees (50%), water (22%) and artificial surfaces (20%) within 3 km, trees (47%) and water (44%) within 16 km, and trees (62%) and water (33%) 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 Santyoku (37.4406°, 129.1708°, elevation 23 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.