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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 39–59°F, 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 68–77°F, 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 55–71°F, 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–-34.9°F, 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. 51.8°F / Annual rainfall: approx. 1318 mm / Summer humidity: 70%–80% / Rainiest month: July

Ganghwa Island monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
24.6°F
16.3
February
29.1°F
16.5
March
39.6°F
43.8
April
51.3°F
55.5
May
59.2°F
82.5
June
68°F
171
July
74.8°F
335.2
August
77.5°F
257.9
September
71.2°F
174.8
October
55°F
84.2
November
42.6°F
55.2
December
28.2°F
25.9

Ganghwa Island weather for the next seven days

12/19
Friday
Patchy rain nearby
43.9°F/34.5°F
12/20
Saturday
Patchy rain nearby
47.3°F/34.3°F
12/21
Sunday
Sunny
32.9°F/27.4°F
12/22
Monday
Sunny
35.1°F/24.9°F
12/23
Tuesday
Moderate rain
38.5°F/30.8°F
12/24
Wednesday
Light freezing rain
34.5°F/26.4°F
12/25
Thursday
Sunny
35.3°F/26.3°F