Mount Fuji in May: weather, what to wear and events

Mount Fuji weather in May

Averages for 1991–2020 at the JMA's Kawaguchiko station (860 m above sea level).

High: 20.6°C (69°F)
Low: 8.9°C (48°F)
Precipitation: 123.2 mm
Wet days: 9.4 days
Sunshine: 181 hours

Highs rise 4.5°C from April and climb another 2.4°C into June.

That is 3.8°C above Kawaguchiko's yearly average high of 16.8°C.

Of our 14 places with temperature records, Kawaguchiko is the 2nd coldest in May: 0.1°C cooler than Nikko and 2.7°C warmer than Sapporo.

May is Kawaguchiko's 6th wettest month (123.2 mm).

Of our 15 places, Kawaguchiko has the 2nd lowest precipitation in May: 2.0 mm less than Takayama and 67.7 mm more than Sapporo.

Rain of 1 mm or more falls on 9.4 days, and 10 mm or more on 3.9 days.

Rain of 30 mm or more in one day falls on 0.9 days.

The sun is out for 40% or more of the possible hours on 16.7 days, and 4.3 days have under 0.1 hours of sunshine.

On the summit of Mt Fuji (3,775 m), the average high is −0.6°C (31°F) and the low −6.3°C (21°F).

Average temperature: 14.3°C (58°F)
Humidity: 73%
Days of 25°C or more: 3.8 days

Early, mid and late May

Kawaguchiko in May by ten-day period: averages for 1991–2020 (JMA)
Days	High	Low	Precipitation
1–10 May	19.9°C	7.5°C	34.4 mm
11–20 May	20.3°C	8.7°C	40.3 mm
21–31 May	21.5°C	10.2°C	48.5 mm

By the last ten days of May the average high in Kawaguchiko is 1.6°C higher than in the first ten.

By ten-day totals, 21–31 May is the wettest (48.5 mm) and 1–10 May the driest (34.4 mm).

What to wear at Mount Fuji in May

Mild: highs around 20.6°C

This is for Kawaguchiko (860 m above sea level).

Long sleeves, or a T-shirt with a light jacket or cardigan.
Layers you can take off: afternoons are 11.7°C warmer than early mornings on average.
A folding umbrella: rain falls on 9.4 days.

Pack

Folding umbrella

Our clothing rules

May records at Mount Fuji

The extremes the JMA has measured in May at its Kawaguchiko station.

Hottest May day: 30.5°C (87°F) on 17 May 2023 (records since 1933); also on 10 May 2009
Coldest May night: −3.0°C (27°F) on 3 May 1953 (records since 1933)
Wettest May day: 110.5 mm on 31 May 2003 (records since 1933)

Holidays and crowds in May

National holidays in May 2027:

Mon 3 May — Constitution Memorial Day
Tue 4 May — Greenery Day
Wed 5 May — Children's Day

Sat 1 May to Wed 5 May: 5 days off in a row

In May 2025, hotels and inns across Yamanashi Prefecture were 43.8% full on average (7th busiest of 12 months). Foreign guests spent 234,190 nights there that month (Japan Tourism Agency). That compares with 45.2% in April and 38.4% in June.

What's on at Mount Fuji in May

Events at Mount Fuji in May: dates from each organizer's official page
Event	When	Where and what
Fuji Shibazakura Festival富士芝桜まつり	Mid-April to late May, depending on the bloom (11 April to 24 May in 2026)	Fuji Motosuko Resort, Motosu, Fujikawaguchiko Town. About 500,000 moss phlox (shibazakura) plants of six varieties bloom on the grounds at the foot of Mt Fuji. The period may change depending on the state of the flowers. Official page

Mount Fuji before and after May

Kawaguchiko: April, May and June (JMA, 1991–2020)
Month	High	Low	Precipitation	Wet days
April	16.1°C (−4.5°C)	3.7°C (−5.2°C)	106.1 mm (−17.1 mm)	8.5 days (−0.9 days)
May	20.6°C	8.9°C	123.2 mm	9.4 days
June	23.0°C (+2.4°C)	13.7°C (+4.8°C)	157.1 mm (+33.9 mm)	11.5 days (+2.1 days)

Other places in May

May: Kawaguchiko against five other places (JMA, 1991–2020)
Place	High	Against Kawaguchiko	Wet days	Against Kawaguchiko
Tokyo	23.6°C	+3.0°C	10.1 days	+0.7 days
Kyoto	25.1°C	+4.5°C	9.7 days	+0.3 days
Osaka	24.9°C	+4.3°C	9.5 days	+0.1 days
Sapporo	17.9°C	−2.7°C	8.5 days	−0.9 days
OkinawaNaha	27.0°C	+6.4°C	11.4 days	+2.0 days

All 15 places in May

Frequently asked questions

What is the weather like at Mount Fuji in May?

The average high is 20.6°C (69°F) and the average low 8.9°C (48°F). 123.2 mm of rain falls on about 9.4 days (JMA, 1991–2020).

What should I wear at Mount Fuji in May?

Long sleeves, or a T-shirt with a light jacket or cardigan. Layers you can take off: afternoons are 11.7°C warmer than early mornings on average. A folding umbrella: rain falls on 9.4 days.

Is Mount Fuji busy in May?

In May 2025, hotels and inns across Yamanashi Prefecture were 43.8% full on average (7th busiest of 12 months). Foreign guests spent 234,190 nights there that month (Japan Tourism Agency).

What are the record temperatures for May at Mount Fuji?

The highest temperature the JMA has recorded in Kawaguchiko in May is 30.5°C (87°F), on 17 May 2023. The lowest is −3.0°C (27°F), on 3 May 1953.

What events are on at Mount Fuji in May?

Fuji Shibazakura Festival: Mid-April to late May, depending on the bloom (11 April to 24 May in 2026).

Related items

Sources for this page

Japan Meteorological Agency (JMA) Normals for 1991–2020: Kawaguchiko (河口湖), month by month (平年値年・月ごとの値)checked October 2, 2026
Japan Meteorological Agency (JMA) Normals for 1991–2020: Kawaguchiko (河口湖), rain days, temperature days and snow (詳細)checked October 2, 2026
Japan Meteorological Agency (JMA) Normals for 1991–2020: Mt Fuji summit (富士山), month by month (平年値年・月ごとの値)checked October 2, 2026
Japan Meteorological Agency (JMA) Ten-day normals for 1991–2020: Kawaguchiko (河口湖) (平年値旬ごとの値)checked October 2, 2026
Japan Meteorological Agency (JMA) Records for May: Kawaguchiko (河口湖) (観測史上1〜10位の値)checked October 2, 2026
Cabinet Office National holidays (国民の祝日について)checked October 2, 2026
Japan Tourism Agency Overnight Travel Statistics Survey, 2025 final figures (宿泊旅行統計調査 2025年年の確定値)checked October 2, 2026
Fuji Motosuko Resort Fuji Shibazakura Festival (富士芝桜まつり)checked October 2, 2026

Mount Fuji in May: weather, what to wear and what's on