Iriomote Weather in January
Iriomote in January sees high temperatures, with highs around 22°C (72°F) and overnight lows of 19°C (66°F). Rainfall is fairly high at around 167 mm (6.6 in) on average, so pack waterproofs just in case.
Rainfall in Iriomote in January
Looking at the last 30 years, the data shows about 23 days with rain, averaging 167 mm (6.6 in) for the month. Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.
Temperature in Iriomote in January
January in Iriomote brings typical temperatures with highs around 22°C (72°F) and lows of 19°C (66°F). This kind of day-to-night contrast is typical for this time of year. With overnight lows of 19°C (66°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep. While this is the time of year with slightly cooler averages, it remains comfortably warm.
Sunshine in Iriomote in January
The area experiences limited sunny days, amounting to roughly 73 hours of sunshine. This makes it perfect for those who lean towards cooler, cloudier settings rather than intense sunlit days.If you're inclined towards comfortable temperatures and drier conditions, January is a good time 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 January
Min Temperature
19°C (66°F)
Max Temperature
22°C (72°F)
Chance of Rain
78%
Precipitation
167 mm (6.6 in)
Rainy days
23 days
Humidity
73%
Sunshine
73 hours
Percentage Sunshine
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in Iriomote typically stay consistent throughout January, with daily highs averaging around 22°C (72°F). Nights are pleasant, with lows around 17°C (63°F).
Average temperatures in January
Daily Historical Precipitation
51-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather for Iriomote in January
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 January
The extremes listed below come from historical weather data collected in Iriomote from 1976 through 2025.
- Iriomote recorded its highest January temperature of 28°C (82°F) on January 24, 1980.
- The lowest daytime temperature in January was 12°C (54°F), recorded on January 24, 2016.
- Iriomote registered its coldest January night on January 24, 2016, with temperatures dropping to 8°C (46°F).
- Peak precipitation in January occurred on January 17, 2016, when 116 mm (4.6 in) of precipitation was measured.
Best Places in Japan in January
Find out more about the weather in Japan and which places have the best travel conditions in this month. See all of Japan in January →
perfect weather
pleasant
tolerable
unpleasant
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What to Wear in Iriomote in January
Pleasant temperatures in January mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Sunglasses aren't essential this month, though you might want them for the occasional bright moment.What To Do in Iriomote in January
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.
