Mount Suisho

Mountain Alpine peak in Toyama with sharp granite ridges

In Toyama Prefecture, Mount Suisho sits in the Northern Japan Alps; alpinists seek steep routes and high‑country ridgelines during the summer season.

Main image
Kumonotaira Swiss Garden panoramic.jpg
Kurobe River and Mount Suisho from Mount Mitsumatarenge 2004-08-13.jpg
Mount Suisho from Mount Noguchigoro 1997-8-13.jpg
Mount Washiba and Mount Suisho from Mount Tsubakuro 1996-10-05.jpg
Mt Suishou.jpg
Panoramic of Mount Suisho and Mount Jii from Kumonotaira.jpg
Sieversia pentapetala and Mount Suisho.JPG
Sunset and Mount Washiba from Mount Otensho 2004-05-01.JPG
Top of Mount Sugoroku.jpg
View from Mount Mitsumatarenge panoramic 2.jpg
Mount Suisho
Mount Suisho area, Toyama Prefecture, Japan (part of the Hida/Southern Alps region)
36.4271, 137.6022
Open 24 hours (seasonal access)
Free (no formal fees). Mountain huts may charge for lodging on some routes.

How to Get to Mount Suisho #

Access via the Tateyama-Kurobe area; approach routes typically start from valley trailheads reachable by regional bus services from Toyama or by private car. Local alpine clubs and guide services can arrange hut reservations and logistic support.

Tips for Visiting Mount Suisho #

  • Reserve overnight hut beds in advance during the popular July-September climbing season.
  • Expect steep and sustained climbing-experience with alpine routes is essential.
  • Start early for summit bids to avoid afternoon storms; bring layered clothing for rapidly changing conditions.

Best Time to Visit Mount Suisho #

Midsummer offers the most reliable weather and access; autumn provides clearer vistas but colder conditions.

Summer (July-September)
Jul-Sep · 5-18°C (41-64°F)
Alpine conditions favorable; high huts operate and trails are most accessible.
Autumn (October)
Oct · -2-10°C (28-50°F)
Clear air and fall colors; cold nights and early snow possible.

Weather & Climate near Mount Suisho #

Climate

Mount Suisho's climate is classified as Subarctic - Subarctic climate with cool summers (peaking in August) and freezing winters (coldest in January). Temperatures range from -19°C to 17°C. Heavy rainfall (2215 mm/year), wettest in August.

Best Time to Visit
AugustJulySeptember
Temperature & Rainfall
Temperature Range
31°
Warmest Month
-17°
Coldest Month
Monthly Conditions

January

January is the coldest month with highs of -10°C and lows of -19°C. Moderate rainfall (71 mm), mostly overcast skies, and breezy conditions.

27 Poor

Comfort

-14°
Feels Like Freezing
-14°C
Temperature
-19° -10°
97%
Humidity
Very Humid

Weather

71 mm
Rainfall
8.8 m/s
Wind
Breezy
0.3
UV Index
Low
9.8h daylight

February

February is freezing with highs of -9°C and lows of -19°C. Regular rainfall (83 mm), mostly overcast skies, and breezy conditions.

27 Poor

Comfort

-14°
Feels Like Freezing
-14°C
Temperature
-19° -9°
94%
Humidity
Very Humid

Weather

83 mm
Rainfall
8.9 m/s
Wind
Breezy
0.5
UV Index
Low
10.7h daylight

March

March is freezing with highs of -5°C and lows of -15°C. Significant rainfall (125 mm), mostly overcast skies, and breezy conditions.

23 Poor

Comfort

-10°
Feels Like Freezing
-10°C
Temperature
-15° -5°
89%
Humidity
Very Humid

Weather

125 mm
Rainfall
7.6 m/s
Wind
Breezy
0.8
UV Index
Moderate
11.8h daylight

April

April is freezing with highs of 2°C and lows of -8°C. Significant rainfall (173 mm), partly cloudy skies, and breezy conditions.

29 Poor

Comfort

-3°
Feels Like Freezing
-3°C
Temperature
-8°
81%
Humidity
Very Humid

Weather

173 mm
Rainfall
8.0 m/s
Wind
Breezy
1.2
UV Index
High
13.0h daylight

May

May is cold with highs of 7°C and lows of -3°C. Significant rainfall (197 mm), mostly overcast skies, and breezy conditions.

34 Poor

Comfort

Feels Like Cold
C
Temperature
-3°
78%
Humidity
Very Humid

Weather

197 mm
Rainfall
7.4 m/s
Wind
Breezy
1.5
UV Index
High
14.0h daylight

June

June is cold with highs of 12°C and lows of 2°C. Heavy rain (276 mm), mostly overcast skies, and breezy conditions.

40 Poor

Comfort

Feels Like Cold
C
Temperature
12°
82%
Humidity
Very Humid

Weather

276 mm
Rainfall
6.3 m/s
Wind
Breezy
1.5
UV Index
Very High
14.5h daylight

July

July is cool with highs of 15°C and lows of 7°C. Heavy rain (313 mm) and mostly overcast skies.

52 Acceptable

Comfort

11°
Feels Like Cool
11°C
Temperature
15°
86%
Humidity
Very Humid

Weather

313 mm
Rainfall
5.6 m/s
Wind
Light Breeze
1.6
UV Index
Very High
14.2h daylight

August

August is cool with highs of 17°C and lows of 8°C. The wettest month with heavy rain (340 mm) and mostly overcast skies.

54 Acceptable

Comfort

12°
Feels Like Cool
12°C
Temperature
17°
86%
Humidity
Very Humid

Weather

340 mm
Rainfall
5.5 m/s
Wind
Light Breeze
1.7
UV Index
Very High
13.4h daylight

September

September is cold with highs of 13°C and lows of 4°C. Heavy rain (297 mm), mostly overcast skies, and breezy conditions.

42 Poor

Comfort

Feels Like Cold
C
Temperature
13°
87%
Humidity
Very Humid

Weather

297 mm
Rainfall
6.2 m/s
Wind
Breezy
1.2
UV Index
High
12.3h daylight

October

October is cold with highs of 7°C and lows of -3°C. Significant rainfall (158 mm), partly cloudy skies, and breezy conditions.

38 Poor

Comfort

Feels Like Cold
C
Temperature
-3°
88%
Humidity
Very Humid

Weather

158 mm
Rainfall
6.2 m/s
Wind
Breezy
0.8
UV Index
Moderate
11.1h daylight

November

November is freezing with highs of 0°C and lows of -9°C. Significant rainfall (111 mm), partly cloudy skies, and breezy conditions.

33 Poor

Comfort

-4°
Feels Like Freezing
-4°C
Temperature
-9°
91%
Humidity
Very Humid

Weather

111 mm
Rainfall
8.3 m/s
Wind
Breezy
0.4
UV Index
Low
10.1h daylight

December

December is freezing with highs of -6°C and lows of -15°C. Moderate rainfall (71 mm), mostly overcast skies, and breezy conditions.

29 Poor

Comfort

-10°
Feels Like Freezing
-10°C
Temperature
-15° -6°
95%
Humidity
Very Humid

Weather

71 mm
Rainfall
8.4 m/s
Wind
Breezy
0.2
UV Index
Low
9.6h daylight

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