Ganghwa-gun weather in April

In April, Ganghwa-gun sees average daytime highs of 16°C and overnight lows near 7°C, with 63 mm of rain across 7 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 44% 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 Ganghwa-gun's 7th-clearest and 3rd-windiest month. For the whole year in context, see Ganghwa-gun's year-round climate.

Daytime high
16°
7th warmest
Overnight low
6th coldest
Rainfall
63 mm
7 wet days
Daylight
13 hours
6:05 AM – 7:03 PM
Cloud cover
51%
7th clearest
Wind
12 km/h
3rd windiest
Solar energy
5.43 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 Ganghwa-gun reaches about 16°C in the afternoon and slips back to 7°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 11°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)
1134
2134
3135
4135
5145
6145
7145
8146
9146
10156
11156
12156
13157
14167
15167
16167
17168
18168
19168
20178
21178
22179
23179
24179
25189
26189
271810
281810
291810
301910

How April really feels in Ganghwa-gun

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.

Ganghwa-gun 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 / -6°173.52.19.70.0
Feb / -4°233.81.510.50.1
Mar / 335.20.711.72.3
Apr16° / 637012.95.3
May21° / 13°967.70146.9
Jun25° / 18°1208.7014.66.9
Jul27° / 22°30315.3014.35.4
Aug29° / 23°25114.2013.55.2
Sep25° / 18°1166.9012.37.2
Oct19° / 11°525.10117.0
Nov11° / 477.10.4103.1
Dec / -3°224.71.19.40.1

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 12% of April, with mostly cloudy or overcast conditions the remaining 44%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16040
25941
35941
45941
55842
65842
75743
85743
95743
105743
115743
125644
135644
145644
155545
165545
175446
185545
195545
205446
215545
225545
235446
245446
255446
265446
275446
285545
295446
305545

Chance of precipitation in April

Any precipitation

Ganghwa-gun gets around 63 mm of rain over 7 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 23% and peaks near 26% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
119
219
320
420
520
621
721
821
922
1022
1122
1222
1323
1423
1523
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 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
14991
15991
16991
17991
18991
19991
20982
21982
22982
23973
24964
25964
26955
27946
28937
29928
30919

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 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 6:28 AM to 5:46 AM, and sunset from 6:50 PM to 7:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:286:50
212.46:266:51
312.46:256:51
412.56:236:52
512.56:226:53
612.66:206:54
712.66:196:55
812.76:176:56
912.76:156:57
1012.76:146:58
1112.86:126:59
1212.86:117:00
1312.96:097:01
1412.96:087:02
1512.96:077:03
1613.06:057:03
1713.06:047:04
1813.16:027:05
1913.16:017:06
2013.15:597:07
2113.25:587:08
2213.25:577:09
2313.25:557:10
2413.35:547:11
2513.35:537:12
2613.45:517:13
2713.45:507:14
2813.45:497:15
2913.55:487:16
3013.55:467:17

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.43 kWh/m².

For context, solar energy here swings from a low near 2.31 kWh/m² to a high of 5.82 kWh/m² in May across the year — April's 5.43 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.6Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
Planning a trip in April

Hazard calendar for Ganghwa-gun

In seasonPeak

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

Ganghwa-gun sits in the Pacific typhoon belt; the season peaks July–October.

Ganghwa-gun's rainy season runs July–August, 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 Ganghwa-gun?

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
0.9
Beach & pool
7th-best month of the year

April is a reasonable time to visit Ganghwa-gun for sightseeing.

What to pack for Ganghwa-gun in April

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

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

a warm layersun protection

Sea temperature near Ganghwa-gun in April

The nearest coast averages about 8°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 17 km away) is warmest in August at about 24°C and coldest in February near 4°C.

It's comfortable for a long swim from Jul 7 to Oct 10 — about 3.2 months when the water holds above 20°C.

0°10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan5Bracing
Feb4Bracing
Mar5Bracing
Apr8Bracing
May13Bracing
Jun17Cool
Jul21Refreshing
Aug24Warm
Sep23Refreshing
Oct19Cool
Nov14Bracing
Dec9Bracing

UV index in Ganghwa-gun 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 Ganghwa-gun peaks around July 22 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. 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 highHighModerateJul 22UV 7Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May6High
Jun7High
Jul8Very high
Aug7Very high
Sep7High
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Ganghwa-gun 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 Ganghwa-gun is worst in March — around 160 µg/m³ PM2.5 (very unhealthy), about 2.0× the cleanest month (August, 81 µg/m³).

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

0306090120150180JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyVery unhealthyUnhealthyMar 13158 µg/m³Aug 1282 µg/m³
PM2.5 (µg/m³)Level
Jan145Unhealthy
Feb149Unhealthy
Mar160Very unhealthy
Apr127Unhealthy
May111Unhealthy
Jun98Unhealthy
Jul88Unhealthy
Aug81Unhealthy
Sep110Unhealthy
Oct132Unhealthy
Nov142Unhealthy
Dec133Unhealthy
Location & terrain

Where is Ganghwa-gun?

Ganghwa-gun sits at 37.7°N, 126.5°E, 15 m above sea level, in South Korea. The nearest listed city is Gimpo-si, 24 km away.

Yŏnan-ŭpIncheonBucheon-si

Topography around Ganghwa-gun

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

Within 3 km, the terrain around Ganghwa-gun has only modest variations in elevation — a maximum elevation change of 227 m around an average of 38 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 449 m; within 80 km, large variations in elevation — a maximum elevation change of 924 m.

The land around Ganghwa-gun is covered by trees (39%) and cropland (30%) within 3 km, cropland (31%), trees (30%) and water (23%) within 16 km, and water (33%) and trees (31%) within 80 km.

3 km
227 m
16 km
449 m
80 km
924 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Gimpo-si 24 km · Kaesŏng 26 km · Munsan 29 km · Paech’ŏn-ŭp 32 km · Goyang-si 32 km · Yŏnan-ŭp 34 km · Incheon 38 km · Bucheon-si 38 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 Ganghwa-gun (37.7472°, 126.4856°, elevation 15 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).