Naoshima weather in May

In May, Naoshima sees average daytime highs of 21°C and overnight lows near 17°C, with 121 mm of rain across 9.6 wet days and about 13.8 hours of daylight. It is the 6th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 19°C in the first days to 22°C by the end. The sky is clear or mostly clear about 31% of the time in May, and the air most often feels comfortable.

Daylight stretches from about 13 h 24 min at the start of May to 14 h 06 min by month's end. Set against the rest of the year, May is Naoshima's 9th-clearest and 9th-windiest month. For the whole year in context, see Naoshima's year-round climate.

Daytime high
21°
6th warmest
Overnight low
17°
7th coldest
Rainfall
121 mm
9.6 wet days
Daylight
13 h 48 min
5:06 AM – 6:54 PM
Cloud cover
61%
9th clearest
Wind
12 km/h
9th windiest
Solar energy
5.63 kWh/m²
Travel score
6.5
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 19°C in the first days to 22°C by the end.

A typical May day in Naoshima reaches about 21°C in the afternoon and slips back to 17°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 23°C. Set against its neighbours, May runs about 4°C warmer than April and about 3°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11915
21915
31915
42015
52015
62015
72016
82016
92016
102016
112016
122016
132116
142116
152116
162117
172117
182117
192117
202117
212117
222117
232217
242218
252218
262218
272218
282218
292218
302218
312218

How May really feels in Naoshima

Once humidity and wind are folded in, May 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

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

Naoshima weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 5810.70.6102.0
Feb10° / 619.60.510.72.2
Mar13° / 9310.4011.73.5
Apr17° / 12°10410.4012.85.3
May21° / 17°1219.6013.86.5
Jun24° / 21°15811014.36.3
Jul28° / 24°15911.2014.15.9
Aug29° / 26°867.1013.35.6
Sep27° / 23°15010.2012.26.4
Oct22° / 18°1268.8011.17.0
Nov17° / 12°607.3010.25.6
Dec12° / 609.90.19.73.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 56%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24951
34852
44852
54753
64753
74654
84555
94654
104555
114555
124555
134456
144456
154456
164456
174555
184555
194555
204555
214555
224555
234456
244456
254456
264357
274258
284159
294159
304060
313961

Chance of precipitation in May

Any precipitation

Naoshima gets around 121 mm of rain over 9.6 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 30% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
130
230
330
430
531
631
732
832
932
1033
1133
1233
1333
1433
1532
1632
1732
1831
1931
2030
2130
2230
2329
2429
2528
2628
2728
2827
2927
3027
3127

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the comfortable band about 37% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15632111
25433121
35234131
45135131
54836142
64737152
74537152
84438162
94338172
104238172
114139182
124039183
133940193
143740203
153641213
163441223
173341243
183141253
192941273
202741293
212640304
222440324
232240345
242039365
251938386
261737396
271636417
281435438
2913334410
3012314611
3111304713

Wind in May

Winds average 12 km/h in May.

Across May, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm
3112calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 24 min at the start of May to 14 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over May. Sunrise moves from 5:20 AM to 4:58 AM, and sunset from 6:42 PM to 7:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:206:42
213.45:196:43
313.45:186:44
413.55:176:45
513.55:166:45
613.55:156:46
713.55:146:47
813.65:136:48
913.65:126:49
1013.65:116:49
1113.75:116:50
1213.75:106:51
1313.75:096:52
1413.75:086:53
1513.85:076:53
1613.85:066:54
1713.85:066:55
1813.85:056:56
1913.95:046:56
2013.95:046:57
2113.95:036:58
2213.95:026:59
2314.05:026:59
2414.05:017:00
2514.05:017:01
2614.05:007:01
2714.05:007:02
2814.14:597:03
2914.14:597:04
3014.14:587:04
3114.14:587:05

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.63 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.43 kWh/m² to a high of 5.63 kWh/m² in May across the year — May's 5.63 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.6Bright
295.6Bright
305.6Bright
315.5Bright
Planning a trip in May

Hazard calendar for Naoshima

In seasonPeak

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

Naoshima 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 May a good time to visit Naoshima?

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

6.5
Sightseeing
2nd-best month of the year
3.9
Beach & pool
6th-best month of the year

May is a reasonable time to visit Naoshima for sightseeing.

What to pack for Naoshima in May

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

In May, Naoshima sees daytime highs around 21°C and nights near 17°C. Worth packing: rain gear and sun protection. About 10 days see rain.

rain gearsun protection

Sea temperature near Naoshima in May

The nearest coast averages about 18°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 35 km away) is warmest in August at about 28°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 3 to Nov 12 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May18Cool
Jun22Refreshing
Jul25Warm
Aug28Warm
Sep27Warm
Oct23Refreshing
Nov20Cool
Dec16Cool

UV index in Naoshima in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Naoshima peaks around June 22 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJun 22UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7Very high
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Naoshima in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Naoshima is worst in April — around 23 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1422 µg/m³Oct 1613 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb17Moderate
Mar21Moderate
Apr23Moderate
May20Moderate
Jun18Moderate
Jul15Moderate
Aug15Moderate
Sep13Moderate
Oct12Moderate
Nov13Moderate
Dec13Moderate
Location & terrain

Where is Naoshima?

Naoshima sits at 34.5°N, 134.0°E, 0 m above sea level, in Japan. The nearest listed city is Tamano, 8.0 km away.

Topography around Naoshima

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

Within 3 km, the terrain around Naoshima has only modest variations in elevation — a maximum elevation change of 114 m around an average of 10 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 486 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,946 m.

The land around Naoshima is covered by water (70%) and trees (21%) within 3 km, water (61%) and trees (25%) within 16 km, and trees (56%) and water (30%) within 80 km.

3 km
114 m
16 km
486 m
80 km
1,946 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Tamano 8.0 km · Takamatsu 15 km · Sakaidechō 21 km · Okayama 22 km · Shido 22 km · Utazu 24 km · Hiragi 24 km · Takinomiya 25 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 Naoshima (34.4608°, 133.9972°, 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).