Sinan in Summer
In summer (June, July and August), Sinan sees average daytime highs around 23°C and overnight lows near 21°C, with 589 mm of rain over about 32 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 18°C in early June to 25°C by late August. The sky is clear or mostly clear about 30% of the time across summer, and the air most often feels oppressive.
Summer is Sinan's best season of the year to visit on our travel score. For the whole year in context, see Sinan's year-round climate.
- Avg daytime high
- 23°C
- warmest season of the year
- Avg overnight low
- 21°C
- Rainfall
- 589 mm
- 32 wet days
- Avg wind
- 17 km/h
- Travel score
- 6.4
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Sinan in Summer
Over the season highs climb from about 18°C in early June to 25°C by late August.
A typical summer day in Sinan 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 Sinan
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.
Sinan 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 | 6° / 3° | 40 | 7.5 | 2.8 | 9.9 | 0.4 |
| Feb | 6° / 4° | 45 | 6.6 | 1.8 | 10.7 | 0.4 |
| Mar | 8° / 6° | 71 | 7.3 | 0.4 | 11.7 | 1.5 |
| Apr | 11° / 10° | 91 | 7.6 | 0 | 12.8 | 3.1 |
| May | 15° / 14° | 103 | 7.8 | 0 | 13.8 | 5.1 |
| Jun | 19° / 18° | 171 | 8.7 | 0 | 14.3 | 6.1 |
| Jul | 23° / 22° | 215 | 11.6 | 0 | 14.1 | 6.4 |
| Aug | 25° / 24° | 204 | 11.3 | 0 | 13.3 | 6.7 |
| Sep | 23° / 21° | 161 | 7.7 | 0 | 12.2 | 7.2 |
| Oct | 19° / 17° | 61 | 4.6 | 0 | 11.1 | 7.0 |
| Nov | 14° / 11° | 58 | 6.9 | 0 | 10.2 | 4.2 |
| Dec | 9° / 6° | 44 | 8.1 | 1.7 | 9.7 | 1.6 |
Cloud cover in Summer
The sky is clear or mostly clear about 30% of the time across summer.
Chance of precipitation in Summer
Sinan gets around 589 mm of rain over 32 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 17 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 12 min in early June to 12 h 48 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 5.3 kWh/m².
Hazard calendar for Sinan
In summer, Sinan overlaps its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.
Sinan sits in the Pacific typhoon belt; the season peaks July–October.
Sinan's rainy season runs May–September, when most of the year's rain falls.
Is summer a good time to visit Sinan?
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 Sinan for sightseeing.
What to pack for Sinan in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Sinan sees daytime highs around 23°C and nights near 21°C. Worth packing: light clothes, rain gear and sun protection. About 32 days see rain.
Sea temperature near Sinan 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 22 km away) is warmest in August at about 25°C and coldest in February near 7°C.
It's comfortable for a long swim from Jun 30 to Oct 6 — about 3.3 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 9 | 7 | 8 | 10 | 14 | 18 | 22 | 25 | 23 | 19 | 15 | 12 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Warm | Refreshing | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 9 | Bracing |
| Feb | 7 | Bracing |
| Mar | 8 | Bracing |
| Apr | 10 | Bracing |
| May | 14 | Bracing |
| Jun | 18 | Cool |
| Jul | 22 | Refreshing |
| Aug | 25 | Warm |
| Sep | 23 | Refreshing |
| Oct | 19 | Cool |
| Nov | 15 | Cool |
| Dec | 12 | Bracing |
UV index in Sinan 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 Sinan peaks around June 22 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (moderate).
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 | 6 | 6 | 7 | 8 | 8 | 8 | 8 | 6 | 4 | 2 |
| Level | Moderate | Moderate | High | High | Very high | Very high | Very high | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 3 | Moderate |
| Mar | 6 | High |
| Apr | 6 | High |
| May | 7 | Very high |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 8 | Very high |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 2 | Moderate |
Air quality in Sinan 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 Sinan is worst in March — around 33 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (August, 13 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) | 25 | 29 | 33 | 29 | 23 | 17 | 14 | 13 | 17 | 18 | 21 | 20 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 25 | Moderate |
| Feb | 29 | Moderate |
| Mar | 33 | Moderate |
| Apr | 29 | Moderate |
| May | 23 | Moderate |
| Jun | 17 | Moderate |
| Jul | 14 | Moderate |
| Aug | 13 | Moderate |
| Sep | 17 | Moderate |
| Oct | 18 | Moderate |
| Nov | 21 | Moderate |
| Dec | 20 | Moderate |
Where is Sinan?
Sinan sits at 34.8°N, 126.1°E, 3 m above sea level, in South Korea. The nearest listed city is Mokpo, 26 km away.
Topography around Sinan
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sinan.
Within 3 km, the terrain around Sinan has significant variations in elevation — a maximum elevation change of 337 m around an average of 38 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 346 m; within 80 km, large variations in elevation — a maximum elevation change of 768 m.
The land around Sinan is covered by trees (41%) and water (32%) within 3 km, water (75%) within 16 km, and water (66%) 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 Sinan (34.8262°, 126.1086°, elevation 3 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.