Ishigaki weather in May

In May, Ishigaki sees average daytime highs of 26°C and overnight lows near 25°C, with 165 mm of rain across 14.4 wet days and about 13.2 hours of daylight. It is the 6th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 25°C in the first days to 27°C by the end. The sky is clear or mostly clear about 23% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 54 min at the start of May to 13 h 24 min by month's end. Set against the rest of the year, May is Ishigaki's 7th-clearest and 12th-windiest month. For the whole year in context, see Ishigaki's year-round climate.

Daytime high
26°
6th warmest
Overnight low
25°
7th coldest
Rainfall
165 mm
14.4 wet days
Daylight
13 h 12 min
6:04 AM – 7:15 PM
Cloud cover
67%
7th clearest
Wind
21 km/h
12th windiest
Solar energy
5.59 kWh/m²
Travel score
5.9
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 25°C in the first days to 27°C by the end.

A typical May day in Ishigaki reaches about 26°C in the afternoon and slips back to 25°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 27°C. Set against its neighbours, May runs about 2°C warmer than April and about 2°C cooler than June.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12524
22524
32524
42524
52524
62524
72524
82624
92624
102624
112624
122625
132625
142625
152625
162625
172625
182625
192625
202625
212625
222625
232725
242725
252725
262725
272726
282726
292726
302726
312726

How May really feels in Ishigaki

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.

Ishigaki weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan21° / 19°15516.810.75.2
Feb21° / 19°11213.911.25.4
Mar22° / 20°12213.911.85.9
Apr24° / 22°14813.112.66.3
May26° / 25°16514.413.25.9
Jun28° / 27°16114.213.55.2
Jul29° / 28°1281313.45.2
Aug29° / 27°23216.612.84.8
Sep28° / 27°22315.812.25.3
Oct26° / 25°14013.711.46.1
Nov25° / 23°14514.110.86.2
Dec22° / 20°15415.310.55.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
23961
34060
44060
54060
64060
74159
84258
94258
104159
114060
124060
134060
143961
153961
163862
173763
183763
193664
203565
213565
223466
233466
243466
253466
263466
273367
283268
293268
303268
313169

Chance of precipitation in May

Any precipitation

Ishigaki gets around 165 mm of rain over 14.4 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 47% and peaks near 51% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
144
244
344
443
543
643
743
843
944
1044
1145
1245
1346
1447
1547
1648
1748
1848
1949
2049
2149
2249
2350
2450
2550
2650
2750
2850
2950
3051
3151

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 40% of days. Sticky, muggy-or-worse air turns up on roughly 90% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11613244114
21613234115
31613234116
41513224217
51413224218
61413214219
70312214320
80312204322
90211204423
100210194424
110210194425
12019194427
13018194428
14018194429
15017194430
16017194331
17006194332
18006194333
19005194234
20005184135
21005184036
22005183938
23005173839
24005173741
25005173642
26005163544
27005153445
28005153347
29004143249
30004133152
31004123153

Wind in May

Winds average 21 km/h in May, the calmest month.

Across May, daily wind ranges from about 20 km/h on the calmest days to 22 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
122breezy
222breezy
322breezy
422breezy
522breezy
622breezy
722breezy
821breezy
921breezy
1021breezy
1121breezy
1221breezy
1321breezy
1421breezy
1521breezy
1621breezy
1721breezy
1820breezy
1920breezy
2020breezy
2120breezy
2220breezy
2320breezy
2420breezy
2520breezy
2620breezy
2720breezy
2820breezy
2920breezy
3021breezy
3121breezy

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 54 min at the start of May to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over May. Sunrise moves from 6:14 AM to 5:59 AM, and sunset from 7:07 PM to 7:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:147:07
212.96:137:08
312.96:127:08
413.06:127:09
513.06:117:09
613.06:107:10
713.06:097:10
813.06:097:11
913.16:087:11
1013.16:087:12
1113.16:077:12
1213.16:067:13
1313.16:067:13
1413.16:057:14
1513.26:057:14
1613.26:047:15
1713.26:047:15
1813.26:037:16
1913.26:037:16
2013.26:037:17
2113.36:027:17
2213.36:027:18
2313.36:017:18
2413.36:017:19
2513.36:017:19
2613.36:007:20
2713.36:007:20
2813.36:007:21
2913.46:007:21
3013.45:597:22
3113.45:597:22

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.59 kWh/m².

For context, solar energy here swings from a low near 2.42 kWh/m² to a high of 6.37 kWh/m² in July across the year — May's 5.59 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
315.6Bright
Planning a trip in May

Hazard calendar for Ishigaki

In seasonPeak

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

Ishigaki 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 Ishigaki?

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

5.9
Sightseeing
4th-best month of the year
5.6
Beach & pool
6th-best month of the year

May is a reasonable time to visit Ishigaki for sightseeing.

What to pack for Ishigaki in May

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

In May, Ishigaki sees daytime highs around 26°C and nights near 25°C. Pack rain gear. Worth having: light clothes, sun protection and a windbreaker. About 14 days see rain.

rain gearlight clothessun protectiona windbreaker

Sea temperature near Ishigaki in May

The nearest coast averages about 26°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 July at about 29°C and coldest in February near 23°C.

The water stays above 20°C all year — warm enough for a swim any month.

22°24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan23Refreshing
Feb23Refreshing
Mar23Refreshing
Apr25Warm
May26Warm
Jun28Tropical
Jul29Tropical
Aug29Tropical
Sep28Tropical
Oct27Warm
Nov26Warm
Dec25Warm

UV index in Ishigaki in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ishigaki peaks around June 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highVery highExtremeVery highHighJun 20UV 12Dec 20UV 5
UV index (midday)Level
Jan6High
Feb8Very high
Mar10Extreme
Apr9Very high
May10Very high
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep11Extreme
Oct8Very high
Nov7High
Dec5High

Air quality in Ishigaki 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 Ishigaki is worst in March — around 15 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (June, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 1815 µg/m³Jun 207 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb12Moderate
Mar15Moderate
Apr13Moderate
May9Good
Jun7Good
Jul8Good
Aug9Good
Sep8Good
Oct9Good
Nov10Good
Dec11Good
Location & terrain

Where is Ishigaki?

Ishigaki sits at 24.3°N, 124.2°E, 18 m above sea level, in Japan. The nearest listed city is Hirara, 127 km away.

Topography around Ishigaki

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

Within 3 km, the terrain around Ishigaki has only modest variations in elevation — a maximum elevation change of 217 m around an average of 22 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 528 m; within 80 km, significant variations in elevation — a maximum elevation change of 517 m.

The land around Ishigaki is covered by water (37%), artificial surfaces (22%) and trees (20%) within 3 km, water (78%) within 16 km, and water (96%) within 80 km.

3 km
217 m
16 km
528 m
80 km
517 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Hirara 127 km · Miyakojima 127 km · Yilan 247 km · Jiufen 249 km · Xiulin 258 km · Keelung 259 km · Hualien 262 km · Xizhi 265 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 Ishigaki (24.3448°, 124.1572°, elevation 18 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).