Yakushima weather by month

Check out Yakushima weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Yakushima (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
11°C maximum daytime temperature in January in Yakushima11
11°C maximum daytime temperature in February in Yakushima11
14°C maximum daytime temperature in March in Yakushima14
18°C maximum daytime temperature in April in Yakushima18
21°C maximum daytime temperature in May in Yakushima21
24°C maximum daytime temperature in June in Yakushima24
27°C maximum daytime temperature in July in Yakushima27
27°C maximum daytime temperature in August in Yakushima27
25°C maximum daytime temperature in September in Yakushima25
22°C maximum daytime temperature in October in Yakushima22
17°C maximum daytime temperature in November in Yakushima17
13°C maximum daytime temperature in December in Yakushima13
Min temperature (night-time)
5°C minimum night-time temperature in January in Yakushima5
5°C minimum night-time temperature in February in Yakushima5
7°C minimum night-time temperature in March in Yakushima7
11°C minimum night-time temperature in April in Yakushima11
14°C minimum night-time temperature in May in Yakushima14
18°C minimum night-time temperature in June in Yakushima18
21°C minimum night-time temperature in July in Yakushima21
21°C minimum night-time temperature in August in Yakushima21
20°C minimum night-time temperature in September in Yakushima20
15°C minimum night-time temperature in October in Yakushima15
11°C minimum night-time temperature in November in Yakushima11
7°C minimum night-time temperature in December in Yakushima7
Heat & Humidity
No heat & humidity in January in Yakushima0
No heat & humidity in February in Yakushima0
No heat & humidity in March in Yakushima0
No heat & humidity in April in Yakushima0
No heat & humidity in May in Yakushima0
Low heat & humidity in June in YakushimaL
High heat & humidity in July in YakushimaH
High heat & humidity in August in YakushimaH
Moderate heat & humidity in September in YakushimaM
No heat & humidity in October in Yakushima0
No heat & humidity in November in Yakushima0
No heat & humidity in December in Yakushima0
Sea temperature
20°C sea temperature in January in Yakushima20
19°C sea temperature in February in Yakushima19
20°C sea temperature in March in Yakushima20
21°C sea temperature in April in Yakushima21
23°C sea temperature in May in Yakushima23
25°C sea temperature in June in Yakushima25
28°C sea temperature in July in Yakushima28
29°C sea temperature in August in Yakushima29
28°C sea temperature in September in Yakushima28
26°C sea temperature in October in Yakushima26
24°C sea temperature in November in Yakushima24
22°C sea temperature in December in Yakushima22

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & UV index in Yakushima

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
10 hours of daylight per day in January in Yakushima10
11 hours of daylight per day in February in Yakushima11
12 hours of daylight per day in March in Yakushima12
13 hours of daylight per day in April in Yakushima13
14 hours of daylight per day in May in Yakushima14
14 hours of daylight per day in June in Yakushima14
14 hours of daylight per day in July in Yakushima14
13 hours of daylight per day in August in Yakushima13
12 hours of daylight per day in September in Yakushima12
11 hours of daylight per day in October in Yakushima11
11 hours of daylight per day in November in Yakushima11
10 hours of daylight per day in December in Yakushima10
UV Index (Maximum)
UV (maximum) index 4 (Moderate) in January in Yakushima4
UV (maximum) index 6 (High) in February in Yakushima6
UV (maximum) index 8 (Very High) in March in Yakushima8
UV (maximum) index 10 (Very High) in April in Yakushima10
UV (maximum) index 11 (Extreme) in May in Yakushima11
UV (maximum) index 11 (Extreme) in June in Yakushima11
UV (maximum) index 11 (Extreme) in July in Yakushima11
UV (maximum) index 11 (Extreme) in August in Yakushima11
UV (maximum) index 9 (Very High) in September in Yakushima9
UV (maximum) index 7 (High) in October in Yakushima7
UV (maximum) index 5 (Moderate) in November in Yakushima5
UV (maximum) index 4 (Moderate) in December in Yakushima4

Rainfall in Yakushima

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
23 days with some rainfall in January in Yakushima23
21 days with some rainfall in February in Yakushima21
23 days with some rainfall in March in Yakushima23
20 days with some rainfall in April in Yakushima20
20 days with some rainfall in May in Yakushima20
22 days with some rainfall in June in Yakushima22
20 days with some rainfall in July in Yakushima20
21 days with some rainfall in August in Yakushima21
20 days with some rainfall in September in Yakushima20
18 days with some rainfall in October in Yakushima18
17 days with some rainfall in November in Yakushima17
21 days with some rainfall in December in Yakushima21
Average monthly rainfall (mm)
170 mm monthly rainfall in January in Yakushima170
211 mm monthly rainfall in February in Yakushima211
312 mm monthly rainfall in March in Yakushima312
331 mm monthly rainfall in April in Yakushima331
407 mm monthly rainfall in May in Yakushima407
531 mm monthly rainfall in June in Yakushima531
302 mm monthly rainfall in July in Yakushima302
260 mm monthly rainfall in August in Yakushima260
330 mm monthly rainfall in September in Yakushima330
224 mm monthly rainfall in October in Yakushima224
203 mm monthly rainfall in November in Yakushima203
162 mm monthly rainfall in December in Yakushima162

More about Yakushima

Yakushima by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Japan

  • Explore latest offers on Fred Olsen Cruises in 2026/2027
  • Find last minute deals or early bird discounts
  • Filter offers by price, destination, ship & departure point

Fred OlsenCruise deal finder

The climate guide for Japan (Yakushima) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Yakushima?

Yakushima has a temperate climate with hot summers and some rainfall in all months.

Yakushima weather in January

Expect daytime maximum temperatures of 11°C in Yakushima, Japan in January based on long-term weather averages. There are 3 hours of sunshine per day on average with 23 days with some rainfall and typically 170 mm of rainfall in the month.

  • 11°C maximum daytime temperature in January in Yakushima11
    11°C max day temperature
  • 3 hours of sunshine per day
  • 23 days with some rainfall in January in Yakushima23
    23 days with some rainfall
  • 5°C minimum night-time temperature in January in Yakushima5
    5°C min night temperature
  • 10 hours of daylight per day in January in Yakushima10
    10 hours of daylight per day
  • No heat & humidity in January in Yakushima0
    No heat & humidity
  • 170 mm monthly rainfall in January in Yakushima170
    170 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in January in Yakushima4
    4 (Moderate) UV index
  • 20°C sea temperature in January in Yakushima20
    20°C sea temperature

Back to months

Yakushima weather in February

Expect daytime maximum temperatures of 11°C in Yakushima, Japan in February based on long-term weather averages. There are 3 hours of sunshine per day on average with 21 days with some rainfall and typically 211 mm of rainfall in the month.

  • 11°C maximum daytime temperature in February in Yakushima11
    11°C max day temperature
  • 3 hours of sunshine per day
  • 21 days with some rainfall in February in Yakushima21
    21 days with some rainfall
  • 5°C minimum night-time temperature in February in Yakushima5
    5°C min night temperature
  • 11 hours of daylight per day in February in Yakushima11
    11 hours of daylight per day
  • No heat & humidity in February in Yakushima0
    No heat & humidity
  • 211 mm monthly rainfall in February in Yakushima211
    211 mm of monthly rainfall
  • UV (maximum) index 6 (High) in February in Yakushima6
    6 (High) UV index
  • 19°C sea temperature in February in Yakushima19
    19°C sea temperature

Back to months

Yakushima weather in March

Expect daytime maximum temperatures of 14°C in Yakushima, Japan in March based on long-term weather averages. There are 4 hours of sunshine per day on average with 23 days with some rainfall and typically 312 mm of rainfall in the month.

  • 14°C maximum daytime temperature in March in Yakushima14
    14°C max day temperature
  • 4 hours of sunshine per day
  • 23 days with some rainfall in March in Yakushima23
    23 days with some rainfall
  • 7°C minimum night-time temperature in March in Yakushima7
    7°C min night temperature
  • 12 hours of daylight per day in March in Yakushima12
    12 hours of daylight per day
  • No heat & humidity in March in Yakushima0
    No heat & humidity
  • 312 mm monthly rainfall in March in Yakushima312
    312 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in March in Yakushima8
    8 (Very High) UV index
  • 20°C sea temperature in March in Yakushima20
    20°C sea temperature

Back to months

Yakushima weather in April

Expect daytime maximum temperatures of 18°C in Yakushima, Japan in April based on long-term weather averages. There are 5 hours of sunshine per day on average with 20 days with some rainfall and typically 331 mm of rainfall in the month.

  • 18°C maximum daytime temperature in April in Yakushima18
    18°C max day temperature
  • 5 hours of sunshine per day
  • 20 days with some rainfall in April in Yakushima20
    20 days with some rainfall
  • 11°C minimum night-time temperature in April in Yakushima11
    11°C min night temperature
  • 13 hours of daylight per day in April in Yakushima13
    13 hours of daylight per day
  • No heat & humidity in April in Yakushima0
    No heat & humidity
  • 331 mm monthly rainfall in April in Yakushima331
    331 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in April in Yakushima10
    10 (Very High) UV index
  • 21°C sea temperature in April in Yakushima21
    21°C sea temperature

Back to months

Yakushima weather in May

Expect daytime maximum temperatures of 21°C in Yakushima, Japan in May based on long-term weather averages. There are 5 hours of sunshine per day on average with 20 days with some rainfall and typically 407 mm of rainfall in the month.

  • 21°C maximum daytime temperature in May in Yakushima21
    21°C max day temperature
  • 5 hours of sunshine per day
  • 20 days with some rainfall in May in Yakushima20
    20 days with some rainfall
  • 14°C minimum night-time temperature in May in Yakushima14
    14°C min night temperature
  • 14 hours of daylight per day in May in Yakushima14
    14 hours of daylight per day
  • No heat & humidity in May in Yakushima0
    No heat & humidity
  • 407 mm monthly rainfall in May in Yakushima407
    407 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in May in Yakushima11
    11 (Extreme) UV index
  • 23°C sea temperature in May in Yakushima23
    23°C sea temperature

Back to months

Yakushima weather in June

Expect daytime maximum temperatures of 24°C in Yakushima, Japan in June based on long-term weather averages. There are 4 hours of sunshine per day on average with 22 days with some rainfall and typically 531 mm of rainfall in the month.

  • 24°C maximum daytime temperature in June in Yakushima24
    24°C max day temperature
  • 4 hours of sunshine per day
  • 22 days with some rainfall in June in Yakushima22
    22 days with some rainfall
  • 18°C minimum night-time temperature in June in Yakushima18
    18°C min night temperature
  • 14 hours of daylight per day in June in Yakushima14
    14 hours of daylight per day
  • Low heat & humidity in June in YakushimaL
    Low heat & humidity
  • 531 mm monthly rainfall in June in Yakushima531
    531 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in June in Yakushima11
    11 (Extreme) UV index
  • 25°C sea temperature in June in Yakushima25
    25°C sea temperature

Back to months

Yakushima weather in July

Expect daytime maximum temperatures of 27°C in Yakushima, Japan in July and high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 20 days with some rainfall and typically 302 mm of rainfall in the month.

  • 27°C maximum daytime temperature in July in Yakushima27
    27°C max day temperature
  • 7 hours of sunshine per day
  • 20 days with some rainfall in July in Yakushima20
    20 days with some rainfall
  • 21°C minimum night-time temperature in July in Yakushima21
    21°C min night temperature
  • 14 hours of daylight per day in July in Yakushima14
    14 hours of daylight per day
  • High heat & humidity in July in YakushimaH
    High heat & humidity
  • 302 mm monthly rainfall in July in Yakushima302
    302 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in July in Yakushima11
    11 (Extreme) UV index
  • 28°C sea temperature in July in Yakushima28
    28°C sea temperature

Back to months

Yakushima weather in August

Expect daytime maximum temperatures of 27°C in Yakushima, Japan in August and high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 21 days with some rainfall and typically 260 mm of rainfall in the month.

  • 27°C maximum daytime temperature in August in Yakushima27
    27°C max day temperature
  • 7 hours of sunshine per day
  • 21 days with some rainfall in August in Yakushima21
    21 days with some rainfall
  • 21°C minimum night-time temperature in August in Yakushima21
    21°C min night temperature
  • 13 hours of daylight per day in August in Yakushima13
    13 hours of daylight per day
  • High heat & humidity in August in YakushimaH
    High heat & humidity
  • 260 mm monthly rainfall in August in Yakushima260
    260 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in August in Yakushima11
    11 (Extreme) UV index
  • 29°C sea temperature in August in Yakushima29
    29°C sea temperature

Back to months

Yakushima weather in September

Expect daytime maximum temperatures of 25°C in Yakushima, Japan in September based on long-term weather averages. There are 5 hours of sunshine per day on average with 20 days with some rainfall and typically 330 mm of rainfall in the month.

  • 25°C maximum daytime temperature in September in Yakushima25
    25°C max day temperature
  • 5 hours of sunshine per day
  • 20 days with some rainfall in September in Yakushima20
    20 days with some rainfall
  • 20°C minimum night-time temperature in September in Yakushima20
    20°C min night temperature
  • 12 hours of daylight per day in September in Yakushima12
    12 hours of daylight per day
  • Moderate heat & humidity in September in YakushimaM
    Moderate heat & humidity
  • 330 mm monthly rainfall in September in Yakushima330
    330 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in September in Yakushima9
    9 (Very High) UV index
  • 28°C sea temperature in September in Yakushima28
    28°C sea temperature

Back to months

Yakushima weather in October

Expect daytime maximum temperatures of 22°C in Yakushima, Japan in October based on long-term weather averages. There are 5 hours of sunshine per day on average with 18 days with some rainfall and typically 224 mm of rainfall in the month.

  • 22°C maximum daytime temperature in October in Yakushima22
    22°C max day temperature
  • 5 hours of sunshine per day
  • 18 days with some rainfall in October in Yakushima18
    18 days with some rainfall
  • 15°C minimum night-time temperature in October in Yakushima15
    15°C min night temperature
  • 11 hours of daylight per day in October in Yakushima11
    11 hours of daylight per day
  • No heat & humidity in October in Yakushima0
    No heat & humidity
  • 224 mm monthly rainfall in October in Yakushima224
    224 mm of monthly rainfall
  • UV (maximum) index 7 (High) in October in Yakushima7
    7 (High) UV index
  • 26°C sea temperature in October in Yakushima26
    26°C sea temperature

Back to months

Yakushima weather in November

Expect daytime maximum temperatures of 17°C in Yakushima, Japan in November based on long-term weather averages. There are 4 hours of sunshine per day on average with 17 days with some rainfall and typically 203 mm of rainfall in the month.

  • 17°C maximum daytime temperature in November in Yakushima17
    17°C max day temperature
  • 4 hours of sunshine per day
  • 17 days with some rainfall in November in Yakushima17
    17 days with some rainfall
  • 11°C minimum night-time temperature in November in Yakushima11
    11°C min night temperature
  • 11 hours of daylight per day in November in Yakushima11
    11 hours of daylight per day
  • No heat & humidity in November in Yakushima0
    No heat & humidity
  • 203 mm monthly rainfall in November in Yakushima203
    203 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in November in Yakushima5
    5 (Moderate) UV index
  • 24°C sea temperature in November in Yakushima24
    24°C sea temperature

Back to months

Yakushima weather in December

Expect daytime maximum temperatures of 13°C in Yakushima, Japan in December based on long-term weather averages. There are 3 hours of sunshine per day on average with 21 days with some rainfall and typically 162 mm of rainfall in the month.

  • 13°C maximum daytime temperature in December in Yakushima13
    13°C max day temperature
  • 3 hours of sunshine per day
  • 21 days with some rainfall in December in Yakushima21
    21 days with some rainfall
  • 7°C minimum night-time temperature in December in Yakushima7
    7°C min night temperature
  • 10 hours of daylight per day in December in Yakushima10
    10 hours of daylight per day
  • No heat & humidity in December in Yakushima0
    No heat & humidity
  • 162 mm monthly rainfall in December in Yakushima162
    162 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in December in Yakushima4
    4 (Moderate) UV index
  • 22°C sea temperature in December in Yakushima22
    22°C sea temperature

Back to months

More about Yakushima

Yakushima by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Japan

  • Explore latest offers on Fred Olsen Cruises in 2026/2027
  • Find last minute deals or early bird discounts
  • Filter offers by price, destination, ship & departure point

Fred OlsenCruise deal finder

The climate guide for Japan (Yakushima) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Compare Yakushima weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Yakushima, Japan and the UK (London).

Maximum daytime temperature (°C)

Yakushima, Japan
UK (London)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

Compare more weather >>

Back to top

More about Japan

Related posts

Popular travel offers

Explore holiday destinations

More holidays

Save with latest deals & discounts

More deals

Airport parking

More parking

Airport lounges

More lounges

Top ^