Santyoku weather in April

In April, Santyoku sees average daytime highs of 14°C and overnight lows near 9°C, with 72 mm of precipitation across 7.7 wet days and about 12.9 hours of daylight. It is the 7th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 12°C in the first days to 16°C by the end. The sky is clear or mostly clear about 43% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of April to 13 h 30 min by month's end. Set against the rest of the year, April is Santyoku's 6th-clearest and 5th-windiest month. For the whole year in context, see Santyoku's year-round climate.

Daytime high
14°
7th warmest
Overnight low
6th coldest
Precipitation
72 mm
7.7 wet days
Daylight
13 hours
5:55 AM – 6:52 PM
Cloud cover
50%
6th clearest
Wind
16 km/h
5th windiest
Solar energy
5.55 kWh/m²
Travel score
4.4
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 12°C in the first days to 16°C by the end.

A typical April day in Santyoku reaches about 14°C in the afternoon and slips back to 9°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 18°C. Set against its neighbours, April runs about 5°C warmer than March and about 4°C cooler than May.

10°15°20°151015202530
Avg high (°C)Avg low (°C)
1127
2127
3127
4127
5128
6128
7138
8138
9138
10138
11138
12139
13149
14149
15149
16149
171410
181410
191510
201510
211510
221510
231510
241511
251511
261611
271611
281611
291611
301612

How April really feels in Santyoku

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

April 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 April compares with the rest of the year at a glance. April is the 7th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -0°527.14.39.70.0
Feb / 486.83.810.60.3
Mar / 638.6311.72.0
Apr14° / 727.70.412.94.4
May18° / 14°767.30146.2
Jun21° / 18°907.9014.56.7
Jul24° / 22°17612.2014.36.4
Aug25° / 23°18412.7013.46.3
Sep22° / 19°18210.6012.36.5
Oct18° / 14°857.70116.3
Nov12° / 667.60.4103.7
Dec / 445.81.79.50.9

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 14% of April, with mostly cloudy or overcast conditions the remaining 43%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25545
35545
45545
55644
65644
75743
85743
95743
105743
115743
125743
135842
145842
155842
165842
175842
185941
195941
205941
215941
225941
235941
245941
255941
265842
275842
285842
295842
305743

Chance of precipitation in April

Any precipitationSnow

Santyoku gets around 72 mm of rain and snow over 7.7 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 26% and peaks near 26% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202530
Rain chance (%)Snow chance (%)
1264
2263
3263
4263
5263
6263
7263
8262
9262
10262
11262
12262
13262
14261
15261
16261
17261
18261
19260
20250
21250
22250
23250
24250
25250
26250
27250
28250
29250
30250

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April lands in the dry band about 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
110000
210000
310000
410000
510000
610000
710000
810000
910000
1010000
1110000
129910
139910
149910
159910
169910
179910
189910
199910
209910
219910
229820
239721
249721
259631
269631
279541
289541
299451
309550

Wind in April

Winds average 16 km/h in April.

Across April, daily wind ranges from about 16 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over April. Sunrise moves from 6:17 AM to 5:36 AM, and sunset from 6:39 PM to 7:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:176:39
212.46:166:40
312.46:146:41
412.56:136:41
512.56:116:42
612.66:096:43
712.66:086:44
812.66:066:45
912.76:056:46
1012.76:036:47
1112.86:026:48
1212.86:006:49
1312.85:596:50
1412.95:586:51
1512.95:566:51
1613.05:556:52
1713.05:536:53
1813.05:526:54
1913.15:506:55
2013.15:496:56
2113.25:486:57
2213.25:466:58
2313.25:456:59
2413.35:447:00
2513.35:427:01
2613.35:417:02
2713.45:407:03
2813.45:387:03
2913.55:377:04
3013.55:367:05

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.55 kWh/m².

For context, solar energy here swings from a low near 2.4 kWh/m² to a high of 6 kWh/m² in May across the year — April's 5.55 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.4Bright
95.4Bright
105.4Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
Planning a trip in April

Hazard calendar for Santyoku

In seasonPeak

In April, Santyoku sits inside its pacific typhoon 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.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is April a good time to visit Santyoku?

Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.4
Sightseeing
7th-best month of the year
0.1
Beach & pool
7th-best month of the year

April is a reasonable time to visit Santyoku for sightseeing.

What to pack for Santyoku in April

From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In April, Santyoku sees daytime highs around 14°C and nights near 9°C. Worth packing: a warm layer and sun protection. About 8 days see rain.

a warm layersun protection

Sea temperature near Santyoku in April

The nearest coast averages about 13°C in April — 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.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb11Bracing
Mar11Bracing
Apr13Bracing
May15Cool
Jun19Cool
Jul22Refreshing
Aug24Warm
Sep23Refreshing
Oct20Refreshing
Nov17Cool
Dec14Bracing

UV index in Santyoku in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks 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 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateAug 16UV 9Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May7High
Jun7High
Jul8Very high
Aug9Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Santyoku in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April 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).

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMar 2239 µg/m³Sep 1817 µg/m³
PM2.5 (µg/m³)Level
Jan26Moderate
Feb30Moderate
Mar40Poor
Apr38Poor
May35Moderate
Jun30Moderate
Jul24Moderate
Aug21Moderate
Sep17Moderate
Oct20Moderate
Nov24Moderate
Dec22Moderate
Location & terrain

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.

GangneungJumunjinNeietsuPyeongchangYeongjuSokcho

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.

3 km
265 m
16 km
1,347 m
80 km
1,549 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Donghae City 13 km · T’aebaek 34 km · Gangneung 44 km · Jumunjin 59 km · Neietsu 68 km · Pyeongchang 69 km · Yeongju 84 km · Sokcho 99 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
none 60%Protestant 17%Buddhist 16%Catholic 6%

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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).