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Iriomote Island

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Top 10 Must-Do Experiences and Attractions in Iriomote Island

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Iriomote Island Weather, Climate and Best Time to Visit

Data source:Meteostat
Update date:2025-09

Iriomote Island year round climate

  • Spring (March–May): 21.6–25.7°C on average, warm and humid with occasional showers. March and April offer pleasant weather, while May sees increased rainfall. Popular activities: Diving, snorkeling, birdwatching. Recommended clothing: Light long-sleeved clothing, sun protection, rain gear.
  • Summer (June–August): 28.7–30.3°C on average, hot and humid with frequent afternoon showers or thunderstorms. Sea breezes offer some relief. Popular activities: Water activities (e.g., swimming, canoeing, kayaking), jungle trekking. Recommended clothing: Light and breathable clothing, sun protection, hat, rain gear.
  • Autumn (September–November): 24.4–28.8°C on average, mild weather, but September experiences heavier rainfall. October and November offer pleasant weather ideal for outdoor activities. Popular activities: Hiking, maple leaf viewing (in some areas), diving, snorkeling. Recommended clothing: Light jacket, long-sleeved shirt, comfortable shoes.
  • Winter (December–February): 19.3–20.4°C on average, relatively warm with occasional showers. Mild weather is suitable for outdoor activities, but warm clothing is recommended. Popular activities: Diving, snorkeling, birdwatching. Recommended clothing: Light warm clothing, jacket.

Iriomote Island climatological average

Annual average temperature: approx. 25°C / Annual rainfall: approx. 2232 mm / Summer humidity: 75%–85% / Rainiest month: September

Iriomote Island monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
19.3°C
96.7
February
20°C
123.3
March
21.6°C
98.3
April
24.6°C
113
May
25.7°C
333.7
June
28.7°C
195.7
July
30.3°C
148.3
August
30.1°C
177.3
September
28.8°C
354
October
27°C
231.7
November
24.4°C
203.3
December
20.4°C
157

Iriomote Island weather for the next seven days

11/21
Friday
Patchy rain nearby
23.3°C/22.6°C
11/22
Saturday
Patchy rain nearby
23.4°C/22.6°C
11/23
Sunday
Patchy rain nearby
24.3°C/23.7°C
11/24
Monday
Patchy rain nearby
24.5°C/23.8°C
11/25
Tuesday
Patchy rain nearby
22.6°C/20.2°C
11/26
Wednesday
Patchy rain nearby
23°C/21.3°C
11/27
Thursday
Patchy rain nearby
23.7°C/22.1°C