Mount Iō (Shiretoko) Mountain
Volcanic cone on Shiretoko Peninsula, fumarolic activity
Volcanic cone on Hokkaido's Shiretoko Peninsula within national park boundaries; visitors come for coastal hikes, thermal fumaroles and wildlife-watching along the peninsula.
Mount Iō (Shiretoko) at a Glance#
How to Get to Mount Iō (Shiretoko)#
Mount Iō sits on the Shiretoko Peninsula in eastern Hokkaido. The usual gateway town is Shari; from there local roads and hiking trails lead toward the mountain and nearby geothermal sites. Public buses serve parts of the peninsula in summer; for remote access hire local transport or join guided tours that include trailheads and coastal boat trips.
Tips for Visiting Mount Iō (Shiretoko)#
- Boat traffic on the Shiretoko Peninsula can be seasonal; check ferry schedules if combining with coastal trips.
- Bring layers-the climate is cool and changeable, and fog often rolls in from the Sea of Okhotsk.
- Respect wildlife: Shiretoko is home to brown bears; stick to marked paths and follow local wardens' advice.
Best Time to Visit Mount Iō (Shiretoko)#
Late spring through early autumn offers the best access and weather for hikes; summers are cool and often foggy but the most practicable season.
Weather & Climate near Mount Iō (Shiretoko)#
Mount Iō (Shiretoko)'s climate is classified as Subarctic - Subarctic climate with cool summers (peaking in August) and freezing winters (coldest in February). Temperatures range from -16°C to 15°C. Abundant rainfall (1293 mm/year), wettest in September.
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Poor | -16° - -10° | -23° | 70 mm | overcast | 86% | 8.1 m/s | 0.1 low | 9.1h |
| February | Poor | -16° - -10° | -23° | 56 mm | overcast | 89% | 7.4 m/s | 0.3 low | 10.3h |
| March | Poor | -13° - -7° | -18° | 90 mm | overcast | 86% | 6.7 m/s | 0.5 moderate | 11.8h |
| April | Poor | -6° - -1° | -10° | 91 mm | overcast | 83% | 6.8 m/s | 0.9 moderate | 13.3h |
| May | Poor | -1° - 5° | -3° | 114 mm | overcast | 85% | 6.1 m/s | 1.2 high | 14.6h |
| June | Poor | 4° - 10° | 3° | 101 mm | overcast | 87% | 5.0 m/s | 1.4 high | 15.3h |
| July | Acceptable | 8° - 14° | 11° | 117 mm | overcast | 89% | 4.5 m/s | 1.5 high | 15.0h |
| August | Acceptable | 10° - 15° | 13° | 152 mm | overcast | 87% | 4.7 m/s | 1.3 high | 13.8h |
| September | Poor | 7° - 12° | 6° | 175 mm | overcast | 83% | 5.5 m/s | 1.0 moderate | 12.4h |
| October | Poor | 1° - 7° | -1° | 142 mm | partly cloudy | 81% | 7.0 m/s | 0.5 low | 10.8h |
| November | Poor | -5° - 0° | -9° | 111 mm | overcast | 81% | 7.5 m/s | 0.2 low | 9.5h |
| December | Poor | -11° - -6° | -18° | 74 mm | overcast | 83% | 7.9 m/s | 0.1 low | 8.7h |
