Iriomote Weather in May
May in Iriomote brings high temperatures, with daytime highs of 28°C (82°F) and nights around 25°C (77°F). Quite a bit of rainfall is expected, around 178 mm (7 in), so pack an umbrella.
Rainfall in Iriomote in May
Past climate data indicates that roughly 22 days will see rain, totalling around 178 mm (7 in) for the month. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.
Temperature in Iriomote in May
In May, expect high temperatures in Iriomote, with highs of 28°C (82°F) and lows of 25°C (77°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With lows around 25°C (77°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Iriomote in May
The area experiences a moderate amount of sunshine, with approximately 167 hours of sunlight expected. This means a decent mix of sun and overcast.If you favor pleasant temperatures and minimal rainfall, May is one of the best months to visit Iriomote.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Japan, check out our Iriomote's climate page.
Iriomote Temperature in May
Min Temperature
25°C (77°F)
Max Temperature
28°C (82°F)
Chance of Rain
73%
Precipitation
178 mm (7 in)
Rainy days
22 days
Humidity
81%
Sunshine
167 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Iriomote typically stay consistent throughout May, with daily highs averaging around 28°C (82°F). Nights are warm, with lows typically ranging from 23°C (73°F) to 25°C (77°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Iriomote in May
Browse day-by-day weather records for Iriomote spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Iriomote historical weather extremes in May
Based on weather observations in Iriomote between 1976 and 2026, these are the recorded extremes during May.
- The warmest day in May was on May 25, 2026, with a maximum of 32°C (90°F).
- The lowest daytime temperature in May was 20°C (68°F), recorded on May 5, 1976.
- Iriomote registered its coldest May night on May 3, 2013, with temperatures dropping to 17°C (63°F).
Best Places in Japan in May
Find out more about the weather in Japan and which places have the best travel conditions in this month. See all of Japan in May →
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What to Wear in Iriomote in May
Warm weather calls for comfortable, breathable clothing in May. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Iriomote in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Japan, check out our Iriomote's climate page.
Temperature Rainfall Sunshine Humidity
See the full Iriomote climate overview or explore weather in Japan.
