富士河口湖町 8月の天気
富士河口湖町の8月:暑い、大雨続き、空気がきれい — 雨の日20日が気にならなければ悪くない時期。
2026年9月更新 · ERA5再解析による気候平年値
富士河口湖町では12か月中11位 · 8月に訪れたい旅行先で1413か所中958位 · 快適スコア68/100(Cランク)
- 日中
- 29°C
- 夜
- 19°C
- 雨の日
- 20
- 日照
- 9.8 h
- 湿度
- 86%
- 日の長さ
- 14 h

8月の富士河口湖町についての旅行者の声
近くの箱根町からのメモ(42 km)
富士河口湖町には8月のメモがまだありません — これは季節を共にする近くの箱根町についてのメモです。
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.
富士河口湖町のほかの月
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.
地図の富士河口湖町のカードから自分のメモを追加できます。
富士河口湖町の気候平年値 — 8月
ERA5再解析による月平均値です。AQIはその月の平均US AQI(米国大気質指数)です。
8月の富士河口湖町の混雑
その場所自体の混み具合 — 学校休暇や大型連休、編集部がタグ付けした月、そして天気の良さによる人気の高さ。快適スコアには含まれません。
ピークの混雑Kawaguchiko Lake Festival Fireworks、日本のSummer break (natsuyasumi)、主な訪問国のうち3か国で学校休暇(推定)
ピークの混雑混雑ショルダーシーズン閑散
富士河口湖町の天気が良い月
この旅行先自身の一年間の快適スコアでランキングしています — 混み具合とは別のものです(上の「混雑」を参照)。
天気はまずまず富士河口湖町の天気は一年を通じて大きく変わりません — どの月も快適さはほぼ一定です。
8月の富士河口湖町のイベント
毎年の季節のイベント、自然の見どころ、休業、祝日 — 厳選し出典を明記しています。
- オープン
Mount Fuji climbing season
7月1日〜9月10日トレイルシーズン早めの予約をThe 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. 出典 ↗
- ルール
Mount Fuji climbing fee
7月1日〜9月10日Four 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. 出典 ↗
- 祭り
Fuji Kawaguchiko Music Festival
7月15日〜8月24日 · 例年早めの予約をAn orchestral and chamber music festival at the Kawaguchiko Stellar Theater running since 2002, filling the lakeside concert halls through midsummer. 出典 ↗
- 要注意
Typhoon season
8月1日〜10月15日 · 例年休業A 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. 出典 ↗
- 祭り
Kawaguchiko Lake Festival Fireworks
8月5日光と火の祭り混雑Around ten thousand fireworks over the lake with Mount Fuji behind them, the largest of the Fuji Five Lakes' summer displays and running since 1917. 出典 ↗
近くで開催中のイベント
富士河口湖町から300 km以内 — 日帰りやちょっとした移動で行けて、今月何かがある場所です。快適スコアには含まれません。
富士河口湖町はどこにある?
8月の富士河口湖町 — よくある質問
- 8月は富士河口湖町を訪れるのに良い時期ですか?
- 富士河口湖町の8月:暑い、大雨続き、空気がきれい — 雨の日20日が気にならなければ悪くない時期。SeasonMapの快適スコアでは、富士河口湖町の12か月中11位です(68/100)。
- 8月の富士河口湖町はどんな天気ですか?
- 8月の富士河口湖町は、平均最高気温28.9°C、最低気温19°C、降水量は約177 mmで、雨の日はおよそ19.7日です。
- 8月の富士河口湖町の大気質はどうですか?
- 8月の富士河口湖町の米国大気質指数(US AQI)は、平均約38です。
300 km圏内:MatsumotoのKamikochi open season(4月17日〜11月15日ごろ)、HakubaのHigh trails and huts open(7月1日〜10月15日ごろ)。