Gunsan weather in April

In April, Gunsan sees average daytime highs of 16°C and overnight lows near 9°C, with 81 mm of rain across 7.2 wet days and about 12.9 hours of daylight. It is the 7th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 13°C in the first days to 18°C by the end. The sky is clear or mostly clear about 42% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 18 min at the start of April to 13 h 24 min by month's end. Set against the rest of the year, April is Gunsan's 4th-clearest and 5th-windiest month. For the whole year in context, see Gunsan's year-round climate.

Daytime high
16°
7th warmest
Overnight low
6th coldest
Rainfall
81 mm
7.2 wet days
Daylight
12 h 54 min
6:06 AM – 7:01 PM
Cloud cover
51%
4th clearest
Wind
12 km/h
5th windiest
Solar energy
5.53 kWh/m²
Travel score
5.3
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 13°C in the first days to 18°C by the end.

A typical April day in Gunsan reaches about 16°C in the afternoon and slips back to 9°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 20°C. Set against its neighbours, April runs about 6°C warmer than March and about 5°C cooler than May.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
1136
2137
3137
4147
5147
6147
7148
8148
9158
10158
11158
12158
13159
14159
15169
16169
17169
181610
191610
201710
211710
221710
231711
241711
251811
261811
271811
281812
291812
301912

How April really feels in Gunsan

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.

Gunsan weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°245.12.79.80.0
Feb / -1°314.51.310.60.4
Mar10° / 486.70.511.72.5
Apr16° / 817.2012.95.3
May21° / 14°877.2013.96.9
Jun25° / 19°1268014.47.0
Jul28° / 23°25514.4014.25.4
Aug29° / 24°22514013.45.1
Sep25° / 20°1448.3012.27.0
Oct20° / 13°584.9011.17.2
Nov13° / 446.50.110.14.1
Dec / 275.71.99.60.8

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% 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 44%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25842
35842
45941
55941
65941
75941
85941
95941
105842
115743
125743
135644
145644
155644
165644
175545
185545
195545
205545
215545
225545
235545
245545
255545
265545
275545
285446
295446
305446

Chance of precipitation in April

Any precipitation

Gunsan gets around 81 mm of rain over 7.2 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 24% and peaks near 26% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
120
221
321
421
521
622
722
822
922
1023
1123
1223
1324
1424
1524
1624
1724
1824
1924
2024
2125
2225
2325
2425
2526
2626
2726
2826
2926
3026

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 94% 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
49910
59910
69910
79910
89910
99910
109910
119820
129820
139820
149730
159730
169640
179640
189550
199361
209361
219271
229181
239091
2488102
2587112
2685123
2784133
2883143
2981154
3080164

Wind in April

Winds average 12 km/h in April.

Across April, daily wind ranges from about 12 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 18 min at the start of April to 13 h 24 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 6:28 AM to 5:48 AM, and sunset from 6:48 PM to 7:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:286:48
212.46:266:49
312.46:256:50
412.56:236:51
512.56:226:51
612.56:206:52
712.66:196:53
812.66:176:54
912.66:166:55
1012.76:146:56
1112.76:136:56
1212.86:126:57
1312.86:106:58
1412.86:096:59
1512.96:077:00
1612.96:067:01
1712.96:057:02
1813.06:037:02
1913.06:027:03
2013.16:017:04
2113.15:597:05
2213.15:587:06
2313.25:577:07
2413.25:557:08
2513.25:547:08
2613.35:537:09
2713.35:527:10
2813.35:517:11
2913.45:497:12
3013.45:487:13

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.53 kWh/m².

For context, solar energy here swings from a low near 2.22 kWh/m² to a high of 5.87 kWh/m² in May across the year — April's 5.53 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in April

Hazard calendar for Gunsan

In seasonPeak

In April, Gunsan sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Gunsan sits in the Pacific typhoon belt; the season peaks July–October.

Gunsan's rainy season runs June–September, 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 Gunsan?

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

5.3
Sightseeing
6th-best month of the year
0.8
Beach & pool
7th-best month of the year

April is a reasonable time to visit Gunsan for sightseeing.

What to pack for Gunsan in April

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

In April, Gunsan sees daytime highs around 16°C and nights near 9°C. Worth packing: a warm layer and sun protection. About 7 days see rain.

a warm layersun protection

Sea temperature near Gunsan in April

The nearest coast averages about 9°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 14 km away) is warmest in August at about 26°C and coldest in February near 6°C.

It's comfortable for a long swim from Jun 25 to Oct 10 — about 3.6 months when the water holds above 20°C.

0°10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan7Bracing
Feb6Bracing
Mar6Bracing
Apr9Bracing
May14Bracing
Jun19Cool
Jul23Refreshing
Aug26Warm
Sep23Refreshing
Oct19Cool
Nov15Bracing
Dec10Bracing

UV index in Gunsan 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 Gunsan peaks around September 11 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateSep 11UV 8Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5High
Apr6High
May7Very high
Jun7Very high
Jul7Very high
Aug7Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Moderate

Air quality in Gunsan 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 Gunsan is worst in March — around 64 µg/m³ PM2.5 (unhealthy), about 2.0× the cleanest month (July, 32 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorModeratePoorMar 1663 µg/m³Jul 2133 µg/m³
PM2.5 (µg/m³)Level
Jan52Poor
Feb56Unhealthy
Mar64Unhealthy
Apr55Poor
May46Poor
Jun42Poor
Jul32Moderate
Aug35Moderate
Sep43Poor
Oct48Poor
Nov51Poor
Dec48Poor
Location & terrain

Where is Gunsan?

Gunsan sits at 36.0°N, 126.7°E, 14 m above sea level, in South Korea. The nearest listed city is Iksan, 22 km away.

BuyeoYŏnmuNonsanWanju

Topography around Gunsan

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Gunsan.

Within 3 km, the terrain around Gunsan has only modest variations in elevation — a maximum elevation change of 124 m around an average of 12 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 326 m; within 80 km, large variations in elevation — a maximum elevation change of 1,137 m.

The land around Gunsan is covered by artificial surfaces (50%) and water (24%) within 3 km, cropland (36%) and water (24%) within 16 km, and trees (39%) and water (37%) within 80 km.

3 km
124 m
16 km
326 m
80 km
1,137 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
April weather nearby: Iksan 22 km · Kimje 25 km · Buan 28 km · Namsa 31 km · Buyeo 37 km · Yŏnmu 39 km · Nonsan 42 km · Wanju 42 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 Gunsan (35.9786°, 126.7114°, elevation 14 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).