Last updated June 29, 2026
Best Time to Climb Mount Fuji 2026: Season & Weather
Mount Fuji has one of the shortest climbing seasons of any major peak — barely ten weeks — and within it the weather, temperatures, and crowds shift week to week. This guide breaks down the 2026 season month by month, the summit temperatures to expect, the typhoon and rain risk, and the ideal window to climb depending on whether you’re optimizing for weather or for quiet.
Season: July 1 / July 10 to September 10 — and only then.
Best weather: late July to mid-August (after the rainy season, warmest and most stable) — but the most crowded.
Best balance: weekdays in late August / early September — far fewer people, slightly higher typhoon risk.
Avoid: Obon (mid-August) and Saturdays — peak crowds and summit queues.
Summit temps: around 0°C at the pre-dawn sunrise even in summer.
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Why the Season Is So Short
Fuji’s official 2026 season is just over ten weeks: the Yoshida and Subashiri trails open July 1, the Fujinomiya and Gotemba trails open July 10, and all four close September 10. The reason is weather. For most of the year Fuji is buried in snow and lashed by some of the strongest winds in Japan, making it a serious — and frequently fatal — winter mountaineering objective rather than a hike. Only in high summer do the snow clear, the temperatures moderate, and the huts, buses, and trail services open. Climb inside this window and Fuji is a strenuous walk; climb outside it and it’s a different, far more dangerous mountain.
Month-by-Month Breakdown
Early July
Trails just open. The tail of Japan’s rainy season (tsuyu) usually lingers into mid-to-late July, so expect a real chance of rain, cloud, and lingering snow patches up high. The upside: far fewer people, and a genuine sense of the mountain before the crowds arrive.
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The rainy season ends, conditions stabilize, and the weather is often at its best. But Japanese school holidays begin (~July 20) and crowds build quickly. A strong choice on a weekday.
August
The warmest, most stable, and most popular month. Skies are most reliable — but this is peak season: the Obon holiday (mid-August) and weekends bring summit queues, and Yoshida slots and huts sell out fast. Best climbed on a weekday outside Obon.
Early September
Cooler and noticeably quieter as the season winds down, with some of the most pleasant conditions for those who dislike crowds. The trade-off is the highest typhoon risk of the season, which can close trails on short notice. Watch forecasts closely.
Summit Temperatures by Month
The single biggest weather surprise for first-timers is the cold at the top. Temperature drops roughly 6°C per 1,000 m, so the summit runs far colder than the base — and pre-dawn, when you’re standing still waiting for sunrise, wind chill makes it feel colder still.
| Period | Base / 5th Station (day) | Summit (daytime) | Summit (pre-dawn) |
|---|---|---|---|
| Early July | ~15-22°C | ~3-7°C | ~0 to 3°C |
| August | ~18-25°C | ~5-8°C | ~0 to 5°C |
| Early September | ~12-20°C | ~2-6°C | ~ -2 to 2°C |
Add wind chill on top of these figures — the summit is frequently windy. Warm layers and two-piece rain gear are required at the gate equipment check, not optional.
Weather Hazards
- Rainy season (tsuyu): lingers into mid-to-late July — early-season climbs are the wettest.
- Typhoons: the August-September typhoon season can bring storms that close the trails outright; September carries the highest risk.
- Afternoon storms: clouds and thunderstorms build on summer afternoons even after clear mornings — another reason to climb to a hut and summit at dawn.
- Wind & cold: summit wind is common and drives the felt temperature below freezing pre-dawn. Hypothermia is a real risk for the underdressed.
More on staying safe in our Fuji medical guide.
The Best Window: Weather vs Crowds
There’s no single perfect date — it depends on what you’re optimizing for:
Late July to mid-August. The rainy season is over, temperatures are at their warmest, and conditions are most stable — at the cost of the biggest crowds. Climb on a weekday and avoid Obon.
Weekdays in late August or early September. Crowds thin dramatically once the school holidays end, and conditions are still good — you just need to watch the typhoon forecast closely and have flexibility to shift dates.
Daily Pattern & Sunrise Timing
Fuji’s weather follows a daily rhythm: mornings are statistically the clearest, with clouds and the chance of storms building through the afternoon. This is the practical reason the standard climb is a two-day overnight — you stay in a 7th- or 8th-station hut and summit in the pre-dawn hours, catching both the clearest skies and the goraiko sunrise (around 4:30-5:00 AM in season) over the sea of clouds. Climbing in the afternoon, by contrast, often means walking into cloud.
Off-Season: Don’t
From October through June the trails, huts, and shuttle buses are closed, and Fuji becomes a full winter mountaineering objective: deep snow, hard ice, sub-zero temperatures, and ferocious wind. People die on Fuji every off-season, including experienced climbers. It is not a hike then — it requires winter mountaineering skills, crampons, an ice axe, and the judgment to match. For all but expert alpinists, the answer is simple: climb inside the official season.
How We Researched This
Our method.
- Season dates & rules verified against the 2026 Yamanashi and Shizuoka prefectural climbing portals.
- Temperature & weather patterns drawn from Japan Meteorological Agency seasonal data and the standard lapse rate (~6°C per 1,000 m).
- Crowd timing based on Japanese school-holiday and Obon calendars and official Yoshida cap information.
- Research-based: our team has not climbed Fuji; claims are kept to documented data. Last verified June 28, 2026 — confirm dates and forecasts before traveling.
Fuji Weather & Season FAQ
When is the best time to climb Mount Fuji?
The season is early July to September 10. Best weather is late July (after the rainy season) through mid-August, though that’s busiest. For fewer crowds with good conditions, choose weekdays in late August or early September, accepting a slightly higher typhoon risk.
What are the 2026 season dates?
Yoshida and Subashiri open July 1; Fujinomiya and Gotemba open July 10; all close September 10. Outside this window the trails, huts, and buses close and Fuji is a dangerous winter climb.
How cold is the summit in summer?
While the base can be 25-30°C in August, the summit averages only a few degrees above freezing by day and drops to about 0°C – or below with wind chill – at the pre-dawn sunrise. Temperature falls ~6°C per 1,000 m.
What’s the most crowded time?
Obon (mid-August) and weekends during the school holidays (~July 20 to end of August). Queues form near the summit and Yoshida slots and huts sell out. Weekdays in early July or September are far quieter.
Does it rain a lot on Fuji?
Early July often catches the tail of the rainy season (ends mid-to-late July). August-September brings afternoon storms and typhoon risk. Two-piece rain gear is mandatory at the gate.
Can you climb Fuji outside the season?
Strongly discouraged – it’s not a hike then. Off-season Fuji is a serious winter mountaineering objective with snow, ice, extreme cold, and wind, and it claims lives every year. Stick to July-September.
What’s the best time of day for the sunrise?
Goraiko is around 4:30-5:00 AM in season, and mornings are also the clearest time of day before afternoon clouds build – which is why the standard plan is a hut overnight and a pre-dawn summit.
About the Author
Pick Your Window, Then Book Early
Late July to mid-August for the best weather, weekdays in early September for the fewest people — either way, reserve your hut and trail slot as soon as bookings open.
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Global Summit Guide is an independent mountaineering resource founded in 2026. The team combines first-hand trekking and climbing experience with in-depth research and professional health and nutrition review to help climbers choose objectives, prepare properly, and stay safe.
Health, altitude, and nutrition content is reviewed by Taylor Ludlow (Registered Nurse) and Brigg Hoopes (Nutritionist).
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