Tsushima weather in May

In May, Tsushima sees average daytime highs of 18°C and overnight lows near 17°C, with 129 mm of rain across 8.3 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 17°C in the first days to 20°C by the end. The sky is clear or mostly clear about 36% 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 Tsushima's 8th-clearest and 11th-windiest month. For the whole year in context, see Tsushima's year-round climate.

Daytime high
18°
6th warmest
Overnight low
17°
7th coldest
Rainfall
129 mm
8.3 wet days
Daylight
13 h 48 min
5:26 AM – 7:12 PM
Cloud cover
58%
8th clearest
Wind
22 km/h
11th windiest
Solar energy
5.87 kWh/m²
Travel score
6.1
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 17°C in the first days to 20°C by the end.

A typical May day in Tsushima reaches about 18°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 20°C. Set against its neighbours, May runs about 3°C warmer than April and about 3°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11715
21715
31715
41715
51716
61716
71716
81716
91816
101816
111816
121816
131816
141816
151817
161817
171817
181817
191917
201917
211917
221917
231918
241918
251918
261918
271918
281918
292018
302018
312018

Tsushima 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 / 658.60.8101.9
Feb10° / 658.40.410.72.2
Mar12° / 10°1139.80.111.73.3
Apr15° / 13°1249.3012.84.7
May18° / 17°1298.3013.86.1
Jun21° / 20°20210.8014.26.2
Jul25° / 24°21511.8014.16.4
Aug27° / 26°18911.7013.36.3
Sep25° / 23°17110.6012.26.8
Oct21° / 19°916.9011.17.1
Nov16° / 14°828.3010.25.5
Dec12° / 638.50.39.83.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 10% of May, with mostly cloudy or overcast conditions the remaining 54%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25050
35050
44951
54951
64753
74753
84654
94654
104555
114555
124654
134555
144555
154555
164456
174555
184555
194456
204555
214555
224555
234555
244654
254753
264654
274654
284654
294555
304654
314555

Chance of precipitation in May

Any precipitation

Tsushima gets around 129 mm of rain over 8.3 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 28% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
130
230
330
430
530
630
730
830
929
1029
1129
1229
1329
1429
1528
1628
1728
1827
1927
2027
2126
2226
2325
2425
2525
2625
2725
2825
2925
3025
3125

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 39% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15235121
25036131
34837141
44638161
54439171
64239181
74040191
83841201
93642211
103543221
113343231
123144241
132944251
142745271
152645291
162444301
172344321
182143342
192043362
201842382
211741393
221640413
231439434
241337454
251236475
261134496
271032517
28931528
29829549
307275511
317255513

Wind in May

Winds average 22 km/h in May.

Across May, daily wind ranges from about 20 km/h on the calmest days to 24 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
124breezy
224breezy
324breezy
424breezy
523breezy
623breezy
723breezy
823breezy
923breezy
1023breezy
1123breezy
1223breezy
1323breezy
1422breezy
1522breezy
1622breezy
1722breezy
1822breezy
1921breezy
2021breezy
2121breezy
2221breezy
2321breezy
2421breezy
2521breezy
2621breezy
2720breezy
2820breezy
2920breezy
3020breezy
3120breezy

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 5:40 AM to 5:17 AM, and sunset from 7:01 PM to 7:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:407:01
213.45:387:01
313.45:377:02
413.45:367:03
513.55:357:04
613.55:347:05
713.55:337:05
813.65:337:06
913.65:327:07
1013.65:317:08
1113.65:307:08
1213.75:297:09
1313.75:287:10
1413.75:277:11
1513.85:277:12
1613.85:267:12
1713.85:257:13
1813.85:247:14
1913.85:247:15
2013.95:237:15
2113.95:227:16
2213.95:227:17
2313.95:217:18
2414.05:217:18
2514.05:207:19
2614.05:207:20
2714.05:197:20
2814.05:197:21
2914.15:187:22
3014.15:187:22
3114.15:177:23

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.87 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.41 kWh/m² to a high of 5.87 kWh/m² in May across the year — May's 5.87 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.9Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
216.0Bright
226.0Bright
236.0Bright
246.0Intense
256.0Intense
266.0Intense
276.0Intense
286.0Intense
296.0Intense
306.0Intense
316.0Bright
Planning a trip in May

Hazard calendar for Tsushima

In seasonPeak

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

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

Tsushima's rainy season runs March–September, when most of the year's rain falls.

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

Is May a good time to visit Tsushima?

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

6.1
Sightseeing
6th-best month of the year
2.2
Beach & pool
6th-best month of the year

May is a reasonable time to visit Tsushima for sightseeing.

What to pack for Tsushima in May

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

In May, Tsushima sees daytime highs around 18°C and nights near 17°C. Worth packing: rain gear, sun protection and a windbreaker. About 8 days see rain.

rain gearsun protectiona windbreaker

Sea temperature near Tsushima 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 offshore is warmest in August at about 27°C and coldest in March near 15°C.

It's comfortable for a long swim from Jun 6 to Nov 28 — about 5.8 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Bracing
Mar15Bracing
Apr16Cool
May18Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Refreshing
Nov21Refreshing
Dec19Cool

UV index in Tsushima 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 Tsushima peaks around August 24 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateAug 24UV 9Dec 22UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May8Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Tsushima 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 Tsushima is worst in April — around 37 µg/m³ PM2.5 (poor), about 2.2× the cleanest month (September, 17 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateApr 1637 µg/m³Sep 2117 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb27Moderate
Mar35Poor
Apr37Poor
May35Poor
Jun27Moderate
Jul20Moderate
Aug19Moderate
Sep17Moderate
Oct17Moderate
Nov21Moderate
Dec19Moderate
Location & terrain

Where is Tsushima?

Tsushima sits at 34.2°N, 129.3°E, 6 m above sea level, in Japan. The nearest listed city is Iki, 62 km away.

Topography around Tsushima

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

Within 3 km, the terrain around Tsushima has significant variations in elevation — a maximum elevation change of 554 m around an average of 116 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 640 m; within 80 km, large variations in elevation — a maximum elevation change of 628 m.

The land around Tsushima is covered by trees (60%) and water (33%) within 3 km, water (67%) and trees (31%) within 16 km, and water (95%) within 80 km.

3 km
554 m
16 km
640 m
80 km
628 m
treesgrasslandartificial surfaceswater
May weather nearby: Iki 62 km · Geoje 86 km · Hirado 96 km · Kyosai 96 km · Sinhyeon 97 km · Busan 102 km · Matsuura 103 km · Karatsu 106 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 Tsushima (34.2063°, 129.2908°, elevation 6 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).