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A moss-covered stream with large boulders in a forest on Yakushima

Photo: Shiratani Unsui Gorge 25.jpg by Σ64 (CC BY 3.0, cropped), via Wikimedia Commons.

Yakushima weather by month: temperature, rain and what to wear

Yakushima's average high runs from 14.7°C (58°F) in January to 30.9°C (88°F) in August (JMA, 1991–2020). The wettest month is June (860.3 mm) and the driest is August (256.5 mm).

When to go to Yakushima, by the numbers

  • No month has average highs between 15°C and 25°C with fewer than 10 wet days.
  • Fewest wet days: July (11.5 days) and October (11.5 days).
  • Quietest hotels in 2025 (Kagoshima Prefecture): June (45.1%), July (45.9%) and January (47.9%).
  • Busiest hotels in 2025 (Kagoshima Prefecture): November (59.4%), February (57.0%) and March (55.4%).

What to wear on Yakushima, month by month

Yakushima: our clothing level for each month (from the JMA's averages)
MonthLevelAverage highWet days
JanuaryChilly14.7°C15.5 days
FebruaryCool15.5°C13.6 days
MarchCool18.0°C15.2 days
AprilMild21.4°C12.6 days
MayMild24.5°C12.6 days
JuneWarm26.9°C18.5 days
JulyHot30.5°C11.5 days
AugustHot30.9°C12.9 days
SeptemberWarm28.9°C14.0 days
OctoberWarm25.2°C11.5 days
NovemberMild21.2°C11.7 days
DecemberCool16.8°C14.6 days

How busy Yakushima is, month by month

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

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

  1. Jan47.9%
  2. Feb57.0%
  3. Mar55.4%
  4. Apr49.0%
  5. May51.0%
  6. Jun45.1%
  7. Jul45.9%
  8. Aug52.3%
  9. Sep49.6%
  10. Oct54.5%
  11. Nov59.4%
  12. Dec52.5%

Frequently asked questions

When is the best time to visit Yakushima?

No month has average highs between 15°C and 25°C with fewer than 10 wet days. Fewest wet days: July (11.5 days) and October (11.5 days).

What is the hottest month on Yakushima?

August has the highest average high, 30.9°C (88°F). January has the lowest, 14.7°C (58°F) (JMA, 1991–2020).

What is the rainiest month on Yakushima?

June has the most precipitation (860.3 mm), and June has the most wet days (18.5 days) (JMA, 1991–2020).

Yakushima weather month by month

Averages for 1991–2020 at the JMA's Yakushima station (37 m above sea level). Months with their own page are linked; the others follow.

Yakushima by month: averages for 1991–2020 (JMA)
MonthHighLowPrecipitationWet daysSunshine
January14.7°C8.9°C294.6 mm15.5 days75 hours
February15.5°C9.2°C289.2 mm13.6 days83 hours
March18.0°C11.3°C387.0 mm15.2 days118 hours
April21.4°C14.2°C405.5 mm12.6 days146 hours
May24.5°C17.5°C444.1 mm12.6 days153 hours
June26.9°C21.0°C860.3 mm18.5 days100 hours
July30.5°C23.9°C362.4 mm11.5 days210 hours
August30.9°C24.6°C256.5 mm12.9 days201 hours
September28.9°C22.8°C450.7 mm14.0 days140 hours
October25.2°C19.4°C309.9 mm11.5 days116 hours
November21.2°C15.2°C309.6 mm11.7 days97 hours
December16.8°C11.0°C281.8 mm14.6 days79 hours
Average high on Yakushima, month by month (°C)
  1. Jan14.7°C
  2. Feb15.5°C
  3. Mar18.0°C
  4. Apr21.4°C
  5. May24.5°C
  6. Jun26.9°C
  7. Jul30.5°C
  8. Aug30.9°C
  9. Sep28.9°C
  10. Oct25.2°C
  11. Nov21.2°C
  12. Dec16.8°C

Events on Yakushima through the year

Events on Yakushima: dates from each organizer's official page
EventMonthWhen
Yaku Shrine Taiko New Year's Eve Festival益救神太鼓年越祭Dec and Jan31 December to 1 January, every year Official page
Yakushima Ultra Eco-Maranic屋久島一周ウルトラエコマラニックJanMid-January, every year Official page
Cycling Yakushima and Yakushima Hill Climbサイクリング屋久島・屋久島ヒルクライムFebMid-February, every year Official page
Miyanoura Spring Festival宮之浦春祭りApr29 April, every year Official page
Yakushima Dream Festival屋久島夢祭りNovEarly November, every year Official page

Related items

Yakushima in JanuaryChillyA warm jacket or light coat over a sweater.High14.7°CLow8.9°CPrecipitation294.6 mmWet days15.5 daysYakushima in FebruaryCoolLong sleeves with a light jacket or sweater.High15.5°CLow9.2°CPrecipitation289.2 mmWet days13.6 daysYakushima in MarchCoolLong sleeves with a light jacket or sweater.High18.0°CLow11.3°CPrecipitation387.0 mmWet days15.2 daysYakushima in AprilMildLong sleeves, or a T-shirt and a light jacket.High21.4°CLow14.2°CPrecipitation405.5 mmWet days12.6 days

Back to Japan by month

Read more

Sources for this page

  1. Normals for 1991–2020: Yakushima (屋久島), month by month (平年値 年・月ごとの値)Japan Meteorological Agency (JMA)
  2. Normals for 1991–2020: Yakushima (屋久島), rain days, temperature days and snow (詳細)Japan Meteorological Agency (JMA)
  3. Overnight Travel Statistics Survey, 2025 final figures (宿泊旅行統計調査 2025年 年の確定値)Japan Tourism Agency
  4. Yaku Shrine Taiko New Year's Eve Festival (益救神太鼓年越祭)Yakushima Tourism Association