This is the first time in my life I've seen this many fireflies💗💗💗 It was truly a spectacular sight! The guide was especially kind. Even though we were on the tour with Japanese people, they took great care to guide us! We stopped at sunset spots along the way for photo opportunities, and the fireflies at the spot were truly magnificent🥹. Seeing various frogs and stargazing on the way down was also the best!!! It was fun watching the guide get so excited when they saw a wild cat on the way back lol. Plus, thank you for recommending a restaurant and making a reservation for us! It was very delicious😋
Our guide, Mr. Sato, took us to some great places, and it was incredibly fun! He also stopped us at some really photogenic spots, making it a wonderful memory.
Anonymous User
Couple
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
6/1
Monday
Moderate rain
27.3°C/26.6°C
6/2
Tuesday
Patchy rain nearby
27.3°C/26.8°C
6/3
Wednesday
Partly Cloudy
27.3°C/26.3°C
6/4
Thursday
Sunny
28.2°C/26.9°C
6/5
Friday
Patchy rain nearby
28.3°C/27.2°C
6/6
Saturday
Partly Cloudy
28.1°C/27.3°C
6/7
Sunday
Partly Cloudy
28.7°C/27.5°C
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