Sinan in Spring
In spring (March, April and May), Sinan sees average daytime highs around 12°C and overnight lows near 10°C, with 265 mm of precipitation over about 23 wet days across the season. It is the 3rd-warmest season and the 3rd-wettest season.
Over the season highs climb from about 7°C in early March to 17°C by late May. The sky is clear or mostly clear about 39% of the time across spring, and the air most often feels dry.
Spring is Sinan's 3rd-best season to visit on our travel score. For the whole year in context, see Sinan's year-round climate.
- Avg daytime high
- 12°C
- 3rd-warmest season
- Avg overnight low
- 10°C
- Precipitation
- 265 mm
- 23 wet days
- Avg wind
- 21 km/h
- Travel score
- 3.2
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Sinan in Spring
Over the season highs climb from about 7°C in early March to 17°C by late May.
A typical spring day in Sinan reaches about 12°C and drops to 10°C overnight. The warmest of the three months is May, the coolest March.
How spring really feels in Sinan
Once humidity and wind are folded in, spring brings about 0 days that feel above 32°C and 2 that feel at or below 0°C.
The story in spring is cold — wind chill drags the overnight "feels like" below the raw low.
Sinan 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 | 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 Spring
The sky is clear or mostly clear about 39% of the time across spring.
Chance of precipitation in Spring
Sinan gets around 265 mm of rain and snow over 23 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 21 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 12 min in early March to 14 h 06 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 5.4 kWh/m².
Hazard calendar for Sinan
In spring, 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 spring a good time to visit Sinan?
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 weaker month for outdoor sightseeing in Sinan.
What to pack for Sinan in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Sinan sees daytime highs around 12°C and nights near 10°C. Pack a warm layer. Worth having: a heavy coat, sun protection and a windbreaker. About 23 days see rain.
Sea temperature near Sinan in Spring
The nearest coast averages about 11°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 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 Spring
Clear-sky midday UV across spring averages around 6 — enough to warrant sun protection. 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 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 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.