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Hakone rain by month: rainfall, crowds and events

Hakone gets 3,561 mm of rain and snow in an average year (JMA, 1991–2020). The wettest month is September (448.7 mm) and the driest is December (107.9 mm).

Updated

3,561 mmprecipitation

Hakone weather month by month

Averages for 1991–2020 at the JMA's Hakone station (855 m above sea level). Each month links to its own page.

Hakone by month: averages for 1991–2020 (JMA)
MonthPrecipitationWet daysDays of 10 mm or more
January127.7 mm7.8 days3.5 days
February151.3 mm8.8 days3.9 days
March284.6 mm13.2 days7.3 days
April321.8 mm12.7 days6.8 days
May326.8 mm13.2 days7.6 days
June420.4 mm16.2 days8.5 days
July425.3 mm15.8 days7.7 days
August346.1 mm13.1 days6.0 days
September448.7 mm14.7 days8.9 days
October403.8 mm12.9 days7.9 days
November197.1 mm9.7 days4.8 days
December107.9 mm7.2 days3.2 days

Precipitation in Hakone, month by month (mm)

Jan127.7 mm
Feb151.3 mm
Mar284.6 mm
Apr321.8 mm
May326.8 mm
Jun420.4 mm
Jul425.3 mm
Aug346.1 mm
Sep448.7 mm
Oct403.8 mm
Nov197.1 mm
Dec107.9 mm
Lake Ashi in Hakone with snow-capped Mount Fuji in the distance and a red torii gate of Hakone Shrine on the shore
Photo: Le lac Ashi et le mont Fuji au crépuscule (Hakone, Japon) (27451983537).jpg by Jean-Pierre Dalbéra from Paris, France (CC BY 2.0, cropped), via Wikimedia Commons.

When to go to Hakone, by the numbers

  • Fewest wet days: December (7.2 days).
  • Quietest hotels in 2025 (Kanagawa Prefecture): January (57.7%), June (60.2%) and September (61.7%).
  • Busiest hotels in 2025 (Kanagawa Prefecture): November (72.1%), April (71.2%) and October (70.8%).

How busy Hakone is, month by month

How full hotels across Kanagawa Prefecture were, month by month in 2025 (%)

Average room occupancy for all hotels and inns (Japan Tourism Agency).

Jan57.7%
Feb64.3%
Mar67.3%
Apr71.2%
May63.9%
Jun60.2%
Jul64.3%
Aug69.6%
Sep61.7%
Oct70.8%
Nov72.1%
Dec68.1%

Events in Hakone through the year

Events in Hakone: dates from each organizer's official page
EventMonthWhen
Hakone Ekiden (Tokyo-Hakone Round-trip Collegiate Road Relay)東京箱根間往復大学駅伝競走（箱根駅伝）Jan2 and 3 January: the 103rd edition is on 2 and 3 January 2027 (the 102nd was on 2 and 3 January 2026) Official page
Setsubun Festival at Hakone Shrine箱根神社 節分祭FebSetsubun day: Tuesday 3 February in 2026. Fireworks are held on the night before. Official page
Yutate Shishimai (Hot-Water Lion Dance) at Sengokuhara Suwa Shrine仙石原湯立獅子舞MarEvery year on 27 March; the page says the festival date is fixed on 27 March Official page
Azalea and Rhododendron Fair at Hotel de Yamaつつじ・しゃくなげフェア（山のホテル）Apr and MayEvery May. Azaleas bloom from late April to mid-May and rhododendrons from early to late May. Official page
Hydrangea Train (Ajisai Densha) on the Hakone Tozan Railway箱根登山電車 あじさい電車Jun and JulMid-June to mid-July. Bloom moves uphill with altitude. Official page
Ashinoko Summer Festival Week (1269 Ashinoko Natsu-matsuri Week)1269芦ノ湖夏まつりウィークJul and AugSix evenings from 31 July to 5 August in 2026 Official page
Torii-yaki Festival and Fireworks鳥居焼まつり花火大会Aug5 August in 2026, the last night of the Ashinoko Summer Festival Week Official page
Hakone Gora Daimonji-yaki箱根強羅温泉 大文字焼Aug16 August in 2026 (the Obon send-off fire). Postponed to 17 August in bad weather. Official page
Sengokuhara Pampas Grass Field仙石原すすき草原Oct and NovOctober to November Official page
Hakone Daimyo Gyoretsu (Daimyo Procession)箱根大名行列Nov3 November (Tuesday, a national holiday, in 2026) Official page
Shiwasu no Oharae (Year-End Great Purification) at Hakone Shrine箱根神社 師走大祓DecEvery year on 31 December Official page

Frequently asked questions

What is the rainiest month in Hakone?

September has the most precipitation (448.7 mm), and June has the most wet days (16.2 days) (JMA, 1991–2020).

Related items

Sources for this page

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Back to Japan by month

Compiled by Japan Japan !! · Updated October 2, 2026