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Mount Nantai

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Mount Nantai Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Mount Nantai year round climate

  • Spring (March–May): 1.3–10.6°C on average, cold and humid climate with significant rainfall and occasional snowfall. Common activities: Hiking (be sure to dress warmly and check trail conditions), enjoying mountain views. Recommended clothing: Warm jacket, waterproof pants and jacket, hiking boots.
  • Summer (June–August): 14.9–20°C on average, cool climate with significant rainfall and high humidity. Common activities: Hiking (be sure to protect yourself from rain), admiring alpine plants. Recommended clothing: Breathable waterproof jacket, quick-drying pants and shirt, hiking boots.
  • Autumn (September–November): 10–17.4°C on average, cool and comfortable climate with gradually decreasing rainfall. Common activities: Hiking, enjoying autumn leaves (depending on altitude). Recommended clothing: Light jacket, long-sleeved shirt and pants.
  • Winter (December–February): -3.7–-0.8°C on average, cold and dry climate with a high probability of snowfall. Common activities: Skiing (depending on snow conditions), enjoying snow scenery. Recommended clothing: Warm down jacket, waterproof snow pants, snow boots.

Mount Nantai climatological average

Annual average temperature: approx. 7.9°C / Annual rainfall: approx. 1974 mm / Summer humidity: 70%–80% / Rainiest month: August

Mount Nantai monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
-3.7°C
43.3
February
-3°C
60.7
March
1.3°C
142.1
April
7.1°C
148.4
May
10.6°C
254.7
June
14.9°C
232
July
19.9°C
198.4
August
20°C
335.4
September
17.4°C
279.4
October
10°C
145.4
November
5.4°C
107.7
December
-0.8°C
27

Mount Nantai weather for the next seven days

12/11
Thursday
Patchy rain nearby
9.8°C/-1.6°C
12/12
Friday
Patchy snow nearby
2.2°C/-4.6°C
12/13
Saturday
Partly Cloudy
5.2°C/-5.2°C
12/14
Sunday
Moderate rain
6.3°C/-1.4°C
12/15
Monday
Patchy rain nearby
5.9°C/-2.2°C
12/16
Tuesday
Sunny
5.4°C/-3.6°C
12/17
Wednesday
Sunny
8.7°C/-2.4°C

Mount Nantai Frequently Asked Questions and Useful Information for Travel

How long does it take to hike Mount Nantai?

The four-kilometer mountain trail to Mount Nantai's summit takes approximately seven hours for a round trip. The trail is open annually from April 25th to November 11th and is considered fairly tough, making it suitable only for experienced trekkers.

Is Mount Nantai a volcano?

Yes, Mount Nantai is a conical volcano with an elevation of 2,486 meters. It has been revered as a sacred object of worship since ancient times, particularly for the Nikko Futarasan Shrine.

What is Mount Nantai known for?

Mount Nantai is revered as a sacred object of worship and is also known as "Futarasan." At its summit stands the Okumiya Shrine of Futarasan Shrine, a testament to its historical and spiritual significance.

What are the best times to visit Mount Nantai?

The hiking trail to Mount Nantai is open from April 25th to November 11th each year. Visitors can enjoy the natural beauty and spiritual atmosphere during these months, with autumn offering particularly stunning scenery.

Can beginners hike Mount Nantai?

Due to its challenging four-kilometer trail and seven-hour round trip, Mount Nantai is generally recommended for experienced trekkers. Beginners may find the hike too strenuous and should consider alternative activities in the Nikko area.