How Cold Is Mt. Fuji in Summer? (2026 Guide)

Many first-time visitors are surprised to learn that Mt. Fuji can be extremely cold even during the summer climbing season.

Although temperatures in Tokyo may reach 30–35°C (86–95°F), the weather on Japan’s highest mountain is completely different. At an elevation of 3,776 meters (12,389 ft), temperatures drop significantly, and strong winds can make it feel even colder.

How Cold Does Mt. Fuji Get?

As a general rule, the temperature decreases by about 0.6°C for every 100 meters of elevation gained. By the time you reach the summit, the temperature is often close to 0–5°C (32–41°F) before sunrise—even in July and August. Strong winds can make the perceived temperature even lower, increasing the risk of hypothermia. :contentReference[oaicite:0]{index=0}

If you plan to climb overnight to watch the sunrise (“Goraiko”), be prepared for winter-like conditions at the summit.

The Biggest Mistake First-Time Climbers Make

Many international visitors arrive wearing only a T-shirt, shorts, and sneakers because they assume Mt. Fuji is warm during the summer.

Unfortunately, weather conditions can change rapidly. Sunshine can quickly turn into rain, thick fog, or strong winds. Even experienced hikers always prepare for cold weather.

What Should You Wear?

The safest way to dress for Mt. Fuji is by wearing multiple layers.

✔ Moisture-wicking base layer
✔ Warm fleece or insulated jacket
✔ Waterproof rain jacket
✔ Waterproof rain pants
✔ Hiking trousers
✔ Gloves
✔ Warm hat or beanie
✔ Waterproof hiking boots

Avoid cotton clothing because it stays wet after sweating or rain and can quickly make you cold.

2026 Equipment Checks

For the 2026 climbing season, safety checks have become stricter on Mt. Fuji.

Officials may check that climbers have appropriate equipment before entering the mountain area.
Essential items include:

✔ Proper hiking boots
✔ Separate waterproof rain jacket and rain pants
✔ Warm clothing

Climbers with inadequate equipment may not be allowed to continue. :contentReference[oaicite:1]{index=1}

Don’t Forget These Essential Items

Headlamp (required for overnight climbs)
Extra batteries or power bank
1–2 liters of drinking water
High-energy snacks
Cash for mountain huts and toilets
Sun hat and sunglasses
Sunscreen

Rent Everything You Need

If you’re only climbing Mt. Fuji once, renting your equipment is often much more affordable than buying everything.

KOBE OUTDOOR offers complete Mt. Fuji rental sets, including hiking boots, backpacks, rainwear, warm clothing, trekking poles, headlamps, gloves, gaiters, and more.

Browse All Rental Equipment

Our complete rental sets are especially popular with international travelers because they include almost everything needed for a safe climb.

Forgot to Reserve?

Need equipment at the last minute?

KOBE OUTDOOR now offers Super Express Delivery.
Order between 4:00 PM and 11:00 PM (Japan Time), and we’ll deliver your rental gear to eligible hotels in Tokyo’s 23 wards the following morning.

Learn More About Super Express Delivery

Check the Latest Information

Weather conditions and climbing regulations can change quickly throughout the season.
Before your trip, always check the official Mt. Fuji website for the latest updates.

Official Mt. Fuji Climbing Website