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Hakone in July: rain, what to pack and what's on

In July, Hakone gets 425.3 mm of rain on about 15.8 days (JMA, 1991–2020). The JMA does not measure temperature in Hakone.

Updated

425.3 mmprecipitation
15.8 dayswet days

Hakone weather in July

Averages for 1991–2020 at the JMA's Hakone rain gauge (855 m above sea level). It records precipitation only.

Precipitation
425.3 mm
Wet days
15.8 days

July is Hakone's 2nd wettest month (425.3 mm).

Of our 15 places, Hakone gets the most precipitation in July: 126.2 mm more than Fukuoka.

Rain of 1 mm or more falls on 15.8 days, and 10 mm or more on 7.7 days.

Rain of 30 mm or more in one day falls on 4.0 days, and 50 mm or more on 2.5 days, including 0.9 days with 100 mm or more.

Early, mid and late July

Hakone in July by ten-day period: averages for 1991–2020 (JMA)
DaysPrecipitation
1–10 July174.7 mm
11–20 July128.8 mm
21–31 July125.9 mm

By ten-day totals, 1–10 July is the wettest (174.7 mm) and 21–31 July the driest (125.9 mm).

A red Hakone Tozan Railway train rounding a curve past blooming hydrangea bushes beside the tracks
Photo: Tozan 2001 Hydrangea.jpg by Cassiopeia sweet (Public domain, cropped), via Wikimedia Commons.

Rain gear for Hakone in July

The JMA does not measure temperature in Hakone, so we do not give a clothing level. The JMA's nearest temperature stations are at different heights.

  • Rain gear every day: a sturdy umbrella and a water-resistant jacket. Rain falls on 15.8 days.

Pack

  • Sturdy umbrella and rain jacket

Rainy season and typhoons

In an average year (1991–2020) the JMA says the rainy season in Kanto-Koshin starts around 7 June and ends around 19 July. In 2026 it started around 7 June and ended around 20 July.

In an average July, 0.4 typhoons come within 300 km of the Kanto-Koshin region; across Japan, 2.1 come within 300 km and 0.6 make landfall (JMA, 1991–2020).

July records in Hakone

The extremes the JMA has measured in July at its Hakone station.

Wettest July day
400.0 mm on 26 July 2005 (records since 1976)

Holidays and crowds in July

National holidays in July 2027:

  • Mon 19 July — Marine Day
  • Sat 17 July to Mon 19 July: 3 days off in a row

In July 2025, hotels and inns across Kanagawa Prefecture were 64.3% full on average (7th busiest of 12 months). Foreign guests spent 386,180 nights there that month (Japan Tourism Agency). That compares with 60.2% in June and 69.6% in August.

What's on in Hakone in July

Events in Hakone in July: dates from each organizer's official page
EventWhenWhere and what
Hydrangea Train (Ajisai Densha) on the Hakone Tozan Railway箱根登山電車 あじさい電車Mid-June to mid-July. Bloom moves uphill with altitude.Along the Hakone Tozan Railway line, from Hakone-Yumoto to Gora and Sounzan. Hydrangeas along the line start to bloom from mid-June, and the trains in this season are nicknamed 'Ajisai Densha'. Bloom periods: Hakone-Yumoto, Ohiradai and Miyanoshita mid to late June; Chokoku-no-Mori and Gora late June to early July; Sounzan early to mid July. Peak times vary with weather and temperature. Official page
Ashinoko Summer Festival Week (1269 Ashinoko Natsu-matsuri Week)1269芦ノ湖夏まつりウィークSix evenings from 31 July to 5 August in 2026Lake Ashi, Hakone: Motohakone Bay, Hakone-en Bay, Kojiri Bay and Hakone Bay. A week of rites and fireworks around Hakone Shrine's annual festival, with fireworks starting at 20:00 each night: 31 July Kosui-sai (about 5,000 shells, Motohakone Bay); 1 August festival celebration fireworks (about 2,300, Motohakone Bay); 2 and 3 August Hakone-en Summer Night Festa (about 2,500 each, Hakone-en Bay); 4 August Kojiri Ryujin-sai (about 2,200, Kojiri Bay); 5 August Torii-yaki Festival (about 3,500, Hakone Bay). Night stalls are listed for 31 July and 2, 3 and 5 August, not for 1 August, and are undecided for 4 August. Official page

Hakone before and after July

Hakone: June, July and August (JMA, 1991–2020)
MonthPrecipitationWet daysDays of 10 mm or more
June420.4 mm (−4.9 mm)16.2 days (+0.4 days)8.5 days (+0.8 days)
July425.3 mm15.8 days7.7 days
August346.1 mm (−79.2 mm)13.1 days (−2.7 days)6.0 days (−1.7 days)

Other places in July

July: Hakone against five other places (JMA, 1991–2020)
PlacePrecipitationAgainst HakoneWet daysAgainst Hakone
Tokyo156.2 mm−269.1 mm10.5 days−5.3 days
Kyoto223.6 mm−201.7 mm11.6 days−4.2 days
Osaka174.4 mm−250.9 mm10.0 days−5.8 days
Sapporo90.7 mm−334.6 mm7.7 days−8.1 days
OkinawaNaha188.1 mm−237.2 mm9.4 days−6.4 days

Frequently asked questions

What is the weather like in Hakone in July?

Hakone gets 425.3 mm of rain on about 15.8 days in July (JMA, 1991–2020). The JMA does not record temperature in Hakone.

Is Hakone busy in July?

In July 2025, hotels and inns across Kanagawa Prefecture were 64.3% full on average (7th busiest of 12 months). Foreign guests spent 386,180 nights there that month (Japan Tourism Agency).

What events are on in Hakone in July?

Hydrangea Train (Ajisai Densha) on the Hakone Tozan Railway: Mid-June to mid-July. Bloom moves uphill with altitude. Ashinoko Summer Festival Week (1269 Ashinoko Natsu-matsuri Week): Six evenings from 31 July to 5 August in 2026.

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