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Ganghwa Island

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Ganghwa Island Weather, Climate and Best Time to Visit

Data source:Meteostat
Update date:2025-09

Ganghwa Island year round climate

  • Spring (March–May): Average 4.2–15.1°C, mild climate gradually warming, rainfall gradually increasing. Common activities: picnics, flower viewing, cycling. Recommended clothing: light jacket, long-sleeved shirt, comfortable shoes.
  • Summer (June–August): Average 20.0–25.3°C, hot and humid, higher rainfall, especially in July. Common activities: swimming at the beach, water sports, island exploration. Recommended clothing: light and breathable clothing, sun hat, sunscreen.
  • Autumn (September–November): Average 12.8–21.8°C, cool and comfortable, sunny weather, decreased rainfall. Common activities: maple leaf viewing, hiking, harvesting agricultural products. Recommended clothing: comfortable long-sleeved shirts, light jacket, comfortable shoes.
  • Winter (December–February): Average -4.1–-1.6°C, cold and dry, low rainfall. Common activities: enjoying winter scenery, onsen experience. Recommended clothing: warm coat, hat, scarf, gloves.

Ganghwa Island climatological average

Annual average temperature: approx. 11°C / Annual rainfall: approx. 1318 mm / Summer humidity: 70%–80% / Rainiest month: July

Ganghwa Island monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
-4.1°C
16.3
February
-1.6°C
16.5
March
4.2°C
43.8
April
10.7°C
55.5
May
15.1°C
82.5
June
20°C
171
July
23.8°C
335.2
August
25.3°C
257.9
September
21.8°C
174.8
October
12.8°C
84.2
November
5.9°C
55.2
December
-2.1°C
25.9

Ganghwa Island weather for the next seven days

2/5
Thursday
Cloudy
7.5°C/-5.4°C
2/6
Friday
Sunny
-5.4°C/-9.6°C
2/7
Saturday
Sunny
-5.2°C/-10.9°C
2/8
Sunday
Sunny
-3.7°C/-11.7°C
2/9
Monday
Sunny
4.2°C/-6.6°C
2/10
Tuesday
Patchy moderate snow
2.3°C/0.2°C
2/11
Wednesday
Partly Cloudy
2.9°C/-1.2°C