Fujikawaguchiko (Mount Fuji) weather in August
August in Fujikawaguchiko: hot, soaked, with clean air — fine if you can take 20 rainy days.
Updated September 2026 · climate normals from ERA5 reanalysis
#11 of 12 months in Fujikawaguchiko · #958 of 1413 destinations to visit in August · comfort 68/100 (tier C)
- Days
- 29°C
- Nights
- 19°C
- Wet days
- 20
- Sun
- 9.8 h
- Humidity
- 86%
- Daylight
- 14 h

Traveller notes on Fujikawaguchiko in August
Notes from nearby Hakone (42 km away)
Fujikawaguchiko doesn't have its own notes for August yet — these are about Hakone, close enough to share the season.
Regulars name Hakone as a place to get out of the August heat and are careful about how much relief to promise: it is more comfortable than Tokyo or Kyoto, but only slightly higher, so this is a degree or two rather than a different climate. Our row bears that out - 26.2C reading as 30C at 86 percent humidity, which is muggy by any measure. Their practical advice is about timing rather than location. Take the bath at night, because the temperature drops away from the afternoon, and choose the open-air rotenburo where a breeze reaches you; indoor baths in the shade are the cooler option. Rain is part of the month too: 200mm across 17.4 days. The record: 20.5C nights, 10.1 hours of sun, a 10.2 kph wind and AQI 41.
Other months in Fujikawaguchiko
Fujikawaguchiko-forum threads on a February visit describe winter as genuinely the best season for clear Mount Fuji visibility, posters naming February specifically as when the mountain is almost certainly snow-capped. Regulars call Lake Kawaguchiko genuinely the top viewing spot, several posters naming sunrise and sunset as the real prime times for photos there. Posters call conditions genuinely capable of flipping fast, several regulars recommending a live weather cam check before heading out to avoid disappointment. Regulars call clear February days genuinely reliable more often than other seasons, several threads naming this the reason winter draws so many photographers specifically for Fuji views. Posters recommend flexible timing around a February visit to catch a clear window, several regulars calling this standard given how quickly weather can obscure the mountain. The record: 7.4C days, -5C nights, 81.1mm across 10 days and 67 percent humidity.
Fujikawaguchiko-forum threads on a December visit describe this as genuinely the best month to catch Mount Fuji, posters calling clear skies and chillier conditions the real reason the mountain shows more reliably than in hazier seasons. Regulars call Oishi Park on the northern shore of Lake Kawaguchi a real highlight for photography, several posters naming it for unobstructed views. Posters call roads around the Fuji Five Lakes area, sitting near eight hundred meters, capable of turning icy by late December, though several regulars report main roads staying clear even with accumulation nearby. Regulars recommend Shiraito Falls as a real stop regardless of the mountain's visibility, shops and two waterfalls worth the detour. Posters recommend real layers and caution on back roads, several threads noting December driving here shifts fast once a system moves through. The record: 9.3C days feeling like 7C, -3.2C nights, 61.4mm across over 7 days and 73 percent humidity.
Fujikawaguchiko-forum threads on a late June visit call this genuinely the middle of the season locally, posters describing conditions as capable of turning showery on short notice though not necessarily every single day. Regulars call the odds of a clear Mount Fuji view noticeably lower in June than other months, a real tradeoff for anyone timing a trip around the mountain specifically. Posters recommend a day trip from Tokyo as a genuinely practical approach, allowing a traveler to pick a clearer-looking day rather than committing to an overnight stay. Regulars call the lake itself still worth visiting regardless of visibility, real scenery and museums on offer even on a cloudy day. Posters recommend real waterproof layers and flexible plans, June here capable of shifting fast between sun and a real downpour. The record: 23.9C days feeling like 25C, 13.6C nights, an extraordinarily high 223.8mm across over 17 days and 82 percent humidity.
Fujikawaguchiko-forum threads on a January visit are consistently positive, posters calling this genuinely one of the best windows for clear Mount Fuji views given how crisp the winter air runs. Regulars describe other seasons as more of a gamble, cloud and haze frequently obscuring the mountain, while winter's clearer air makes a good sighting considerably more likely. Posters call real cold-weather layers essential regardless of how clear the sky looks, January readings running genuinely cold once the sun drops. Regulars describe light accumulation as more common at lower elevations by January and February, worth checking current road conditions before a day trip by car. Posters recommend the train or bus from Tokyo for anyone not wanting to navigate winter roads. Regulars call a clear January morning the best bet for the classic photograph. The record: 6.3C days feeling like 2C, -5.9C nights, a notably high 19cm of fresh accumulation and 67 percent humidity.
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Fujikawaguchiko climate normals — August
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Fujikawaguchiko in August
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsKawaguchiko Lake Festival Fireworks, Summer break (natsuyasumi) in Japan, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Fujikawaguchiko's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherFujikawaguchiko's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in Fujikawaguchiko in August
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Opening
Mount Fuji climbing season
1 Jul – 10 SepTrail seasonBook earlyThe Yoshida trail from this side opens on 1 July, the Shizuoka trails on the 10th, and all four close on 10 September. Outside those ten weeks the huts are shut and the mountain is a serious winter climb. Source ↗
- Rule
Mount Fuji climbing fee
1 Jul – 10 SepFour thousand yen per climber on every trail, reserved and paid online before you go. The Yoshida gate is capped at 4,000 people a day and closed between 2pm and 3am to stop overnight dashes. Source ↗
- Festival
Fuji Kawaguchiko Music Festival
15 Jul – 24 Aug · usuallyBook earlyAn orchestral and chamber music festival at the Kawaguchiko Stellar Theater running since 2002, filling the lakeside concert halls through midsummer. Source ↗
- Hazard
Typhoon season
1 Aug – 15 Oct · usuallyClosuresA typhoon closes the Subaru Line and the Fuji trails, stops the buses to the fifth station and hides the mountain for a couple of days. The Chuo expressway buses from Tokyo are often cancelled the same day. Source ↗
- Festival
Kawaguchiko Lake Festival Fireworks
5 AugLights & fireCrowdedAround ten thousand fireworks over the lake with Mount Fuji behind them, the largest of the Fuji Five Lakes' summer displays and running since 1917. Source ↗
Nearby, and something's on
Within 300 km of Fujikawaguchiko — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Fujikawaguchiko?
Fujikawaguchiko in August — FAQ
- Is August a good time to visit Fujikawaguchiko?
- August in Fujikawaguchiko: hot, soaked, with clean air — fine if you can take 20 rainy days. It ranks #11 of 12 months for Fujikawaguchiko on SeasonMap's comfort score (68/100).
- What is the weather like in Fujikawaguchiko in August?
- In August, Fujikawaguchiko averages a daily high of 28.9°C and a low of 19°C, with about 177 mm of rain over roughly 19.7 rainy days.
- What is the air quality in Fujikawaguchiko in August?
- Fujikawaguchiko has a mean US Air Quality Index of about 38 in August.
Within 300 km: Matsumoto's Kamikochi open season around 17 Apr – 15 Nov, and Hakuba's High trails and huts open around 1 Jul – 15 Oct.