Yakushima weather in April

In April, Yakushima sees average daytime highs of 19°C and overnight lows near 17°C, with 190 mm of rain across 12.7 wet days and about 12.7 hours of daylight. It is the 8th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 21°C by the end. The sky is clear or mostly clear about 27% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 18 min at the start of April to 13 h 06 min by month's end. Set against the rest of the year, April is Yakushima's 6th-clearest and 7th-windiest month. For the whole year in context, see Yakushima's year-round climate.

Daytime high
19°
8th warmest
Overnight low
17°
5th coldest
Rainfall
190 mm
12.7 wet days
Daylight
12 h 42 min
5:56 AM – 6:40 PM
Cloud cover
65%
6th clearest
Wind
26 km/h
7th windiest
Solar energy
4.97 kWh/m²
Travel score
5.7
out of 10

Yakushima is human settlement in Japan.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 18°C in the first days to 21°C by the end.

A typical April day in Yakushima reaches about 19°C in the afternoon and slips back to 17°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 22°C. Set against its neighbours, April runs about 3°C warmer than March and about 3°C cooler than May.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11815
21816
31816
41816
51816
61916
71916
81916
91916
101917
111917
121917
131917
141917
151917
161917
172017
182017
192018
202018
212018
222018
232018
242018
252018
262018
272118
282119
292119
302119

How April really feels in Yakushima

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Yakushima weather by month

How April compares with the rest of the year at a glance. April is the 8th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan14° / 12°12213.110.33.8
Feb15° / 12°12612.710.94.0
Mar17° / 14°18214.611.84.8
Apr19° / 17°19012.712.75.7
May22° / 20°21012.913.56.1
Jun25° / 23°43819.613.95.1
Jul27° / 26°17312.613.85.9
Aug28° / 27°14114.713.15.4
Sep27° / 25°23715.812.25.7
Oct24° / 22°1701311.36.5
Nov20° / 18°1491210.56.1
Dec16° / 14°11411.810.14.9

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 11% of April, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14357
24357
34258
44258
54159
64060
74060
83961
93961
103862
113862
123862
133763
143763
153862
163862
173763
183763
193862
203862
213763
223862
233862
243862
253763
263763
273763
283763
293763
303763

Chance of precipitation in April

Any precipitation

Yakushima gets around 190 mm of rain over 12.7 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 43% and peaks near 45% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
143
242
342
442
542
642
743
843
943
1044
1144
1244
1344
1445
1545
1645
1744
1844
1944
2043
2143
2242
2342
2442
2541
2641
2740
2840
2939
3039

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April lands in the dry band about 47% of days. Sticky, muggy-or-worse air turns up on roughly 9% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
166201040
265201140
364211140
462211250
561221250
660221350
758231360
856241460
955251460
1054261460
1151271570
1250271670
1349281670
1447291770
1546291780
1645291880
1744291880
1843291980
1942291991
2042291991
21412920101
22402920101
23392920111
24382921121
25372821131
26352822132
27342822142
28332822152
29312823162
30302823173

Wind in April

Winds average 26 km/h in April.

Across April, daily wind ranges from about 25 km/h on the calmest days to 27 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
127breezy
227breezy
327breezy
427breezy
527breezy
627breezy
727breezy
827breezy
926breezy
1026breezy
1126breezy
1226breezy
1326breezy
1426breezy
1526breezy
1626breezy
1726breezy
1826breezy
1926breezy
2026breezy
2126breezy
2225breezy
2325breezy
2425breezy
2525breezy
2625breezy
2725breezy
2825breezy
2925breezy
3025breezy

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 18 min at the start of April to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over April. Sunrise moves from 6:14 AM to 5:41 AM, and sunset from 6:30 PM to 6:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:146:30
212.36:136:31
312.36:116:32
412.46:106:32
512.46:096:33
612.46:086:33
712.56:066:34
812.56:056:35
912.56:046:35
1012.66:036:36
1112.66:016:37
1212.66:006:37
1312.65:596:38
1412.75:586:38
1512.75:576:39
1612.75:566:40
1712.85:546:40
1812.85:536:41
1912.85:526:42
2012.95:516:42
2112.95:506:43
2212.95:496:44
2312.95:486:44
2413.05:476:45
2513.05:466:46
2613.05:456:46
2713.15:446:47
2813.15:436:48
2913.15:426:48
3013.15:416:49

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.97 kWh/m².

For context, solar energy here swings from a low near 2.24 kWh/m² to a high of 5.86 kWh/m² in July across the year — April's 4.97 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.1Bright
215.1Bright
225.1Bright
235.1Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.3Bright
305.3Bright
Planning a trip in April

Hazard calendar for Yakushima

In seasonPeak

In April, Yakushima sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Yakushima sits in the Pacific typhoon belt; the season peaks July–October.

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

Is April a good time to visit Yakushima?

Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.7
Sightseeing
5th-best month of the year
2.7
Beach & pool
8th-best month of the year

April is a reasonable time to visit Yakushima for sightseeing.

What to pack for Yakushima in April

From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In April, Yakushima sees daytime highs around 19°C and nights near 17°C. Worth packing: rain gear, sun protection and a windbreaker. About 13 days see rain.

rain gearsun protectiona windbreaker

Sea temperature near Yakushima in April

The nearest coast averages about 21°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 29°C and coldest in February near 20°C.

It's comfortable for a long swim from Feb 25 to Feb 7 — about 11.4 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan21Refreshing
Feb20Cool
Mar20Refreshing
Apr21Refreshing
May23Refreshing
Jun25Warm
Jul28Warm
Aug29Tropical
Sep28Warm
Oct26Warm
Nov24Warm
Dec22Refreshing

UV index in Yakushima in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Yakushima peaks around June 22 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 22UV 11Jan 10UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7Very high
Apr9Very high
May9Very high
Jun11Extreme
Jul11Extreme
Aug10Very high
Sep10Extreme
Oct7High
Nov5High
Dec4Moderate

Air quality in Yakushima in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in Yakushima is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (July, 10 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1420 µg/m³Jul 2010 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb16Moderate
Mar20Moderate
Apr21Moderate
May19Moderate
Jun13Moderate
Jul10Good
Aug11Good
Sep10Good
Oct10Good
Nov11Good
Dec10Good
Location & terrain

Where is Yakushima?

Yakushima sits at 30.4°N, 130.6°E, 0 m above sea level, in Japan. The nearest listed city is Nishinoomote, 51 km away.

Topography around Yakushima

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Yakushima.

Within 3 km, the terrain around Yakushima has large variations in elevation — a maximum elevation change of 608 m around an average of 81 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,916 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,893 m.

The land around Yakushima is covered by trees (54%) and water (44%) within 3 km, water (67%) and trees (33%) within 16 km, and water (93%) within 80 km.

3 km
608 m
16 km
1,916 m
80 km
1,893 m
treesgrasslandartificial surfaceswater
April weather nearby: Nishinoomote 51 km · Ibusuki 94 km · Makurazaki 103 km · Minamikyushu 108 km · Kanoya 112 km · Minamisatsuma 117 km · Kaseda-shirakame 119 km · Tarumizu 122 km

Japan travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
100 V · 50 / 60 Hz
Prices
≈ 65% of US
price level, 2025
GDP per capita
$35,951
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.2
per 100k, 2023
Road deaths
3.6
per 100k/yr, 2019
Income group
High
World Bank
English
Very low
EF EPI 446
Religion
Shintoism 49%Buddhism 46%other 4%Christianity 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Yakushima (30.388°, 130.6492°, elevation 0 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).