Iriomote Weather & Climate: Best Time to Visit

The climate in Iriomote experiences moderate temperature changes, with mild shifts between seasons. On average, daytime temperatures range from a very warm 30°C (86°F) in July to a comfortable 22°C (72°F) in January.

Nighttime temperatures range from 28°C (82°F) in July to 19°C (66°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Iriomote has a notably wet climate with abundant precipitation, recording 2042 mm (80 in) of rainfall per year. The amount of precipitation varies moderately throughout the year. The wettest month, August, sees around 245 mm (9.6 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, February, still receives a respectable 136 mm (5.4 in) of rainfall. For more details, please visit our Iriomote Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

In Iriomote, summer days are longer and more sunny, with daily sunshine hours peaking at 8.6 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 2.3 hours per average day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Iriomote.

The city experiences its highest humidity in July, reaching 83%. In January, the humidity drops to its lowest level at 73%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year