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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

6/23
Tuesday
Sunny
82.4°F/64.8°F
6/24
Wednesday
Sunny
83.2°F/64.6°F
6/25
Thursday
Patchy rain nearby
82.1°F/65.1°F
6/26
Friday
Sunny
80.6°F/62.2°F
6/27
Saturday
Sunny
85.1°F/65.9°F
6/28
Sunday
Sunny
81.1°F/67.6°F
6/29
Monday
Sunny
82.7°F/65.5°F