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Mt. Ontake

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Mt. Ontake Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Mt. Ontake year round climate

  • Spring (March–May): 41–59°F on average, mild climate but with more rainfall, especially in April and May. Common activities: mountain hiking (beware of changing weather), viewing mountain flowers. Recommended clothing: waterproof jacket, warm clothing, comfortable hiking shoes.
  • Summer (June–August): 68–77°F on average, hot and humid, with heavier rainfall; precautions against heat and rain are necessary. Common activities: enjoying the cool mountain air, playing by the streams (pay attention to safety). Recommended clothing: light and breathable clothing, rain gear, sun hat.
  • Autumn (September–November): 46–73°F on average, comfortable climate, moderate rainfall, crisp autumn air. Common activities: mountain hiking, viewing maple leaves (depending on the year's foliage). Recommended clothing: comfortable and breathable clothing, light jacket.
  • Winter (December–February): -33–33°F on average, cold and dry, low probability of snowfall. Common activities: skiing (depending on snow conditions), enjoying the winter mountain scenery. Recommended clothing: warm jacket, beanie, gloves, scarf, waterproof and windproof clothing.

Mt. Ontake climatological average

Annual average temperature: approx. 53.6°F / Annual rainfall: approx. 1883 mm / Summer humidity: 70%–80% / Rainiest month: July

Mt. Ontake monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
30°F
85.6
February
32.7°F
85.1
March
41°F
159.9
April
53.8°F
174.3
May
59.4°F
216.8
June
68.2°F
213.6
July
76.5°F
222.8
August
77.2°F
145.9
September
73°F
218.2
October
57°F
160.6
November
46.9°F
123.2
December
35.2°F
77.8

Mt. Ontake weather for the next seven days

12/19
Friday
Sunny
40.4°F/18.9°F
12/20
Saturday
Patchy rain nearby
41.5°F/26.6°F
12/21
Sunday
Moderate rain
49.6°F/30.8°F
12/22
Monday
Moderate or heavy snow showers
27.5°F/18.2°F
12/23
Tuesday
Sunny
38.9°F/19.1°F
12/24
Wednesday
Light rain
34.6°F/27.4°F
12/25
Thursday
Light freezing rain
27.2°F/17°F

Mt. Ontake Frequently Asked Questions and Useful Information for Travel

Why is Mount Ontake sacred?

The Ontake faith worships the mountain itself. Kakumei and Fukan designated Mt. Ontake as the resting place for the soul after death and taught that the soul returns to the mountain.

When was the last time Mount Ontake erupted?

The last significant eruption of Mount Ontake occurred in 2014. This volcano has a history of eruptions, including several phreatic eruptions between 1979 and 2014.

Can you climb Mount Ontake?

Yes, you can climb Mount Ontake. While one trail starts at the bottom of the mountain in Kiso, very few walk the whole route today. The easiest way is to take the Ontake Ropeway, which whisks you up to within a couple hours' hike of the summit.

Will Mount Ontake erupt again?

Mount Ontake is an active volcano, and it is likely to erupt again someday, although predicting when is difficult. The 2014 eruption occurred suddenly.

What is the best way to access the summit of Mount Ontake?

The most convenient way to reach the upper reaches of Mount Ontake is by taking the Ontake Ropeway. From the ropeway's upper station, a hike of about two hours will take you to the summit, offering spectacular views.