Ishigaki weather in August

In August, Ishigaki sees average daytime highs of 29°C and overnight lows near 27°C, with 232 mm of rain across 16.6 wet days and about 12.8 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 38% of the time in August, and the air most often feels miserable.

Daylight stretches from about 13 h 06 min at the start of August to 12 h 30 min by month's end. Set against the rest of the year, August is Ishigaki's 3rd-clearest and 11th-windiest month. For the whole year in context, see Ishigaki's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
27°
11th coldest
Rainfall
232 mm
16.6 wet days
Daylight
12 h 54 min
6:22 AM – 7:13 PM
Cloud cover
58%
3rd clearest
Wind
23 km/h
11th windiest
Solar energy
5.82 kWh/m²
Travel score
4.8
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical August day in Ishigaki reaches about 29°C in the afternoon and slips back to 27°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 29°C. Set against its neighbours, August runs on par with July and about 1°C warmer than September.

24°26°28°30°32°151015202531
Avg high (°C)Avg low (°C)
12928
22928
32928
42928
52928
62928
72928
82928
92928
102928
112928
122928
132928
142928
152928
162928
172927
182927
192927
202927
212927
222927
232927
242927
252927
262927
272927
282927
292927
302927
312927

How August really feels in Ishigaki

Once humidity and wind are folded in, August averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Ishigaki weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 1st-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 August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 12% of August, with mostly cloudy or overcast conditions the remaining 51%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
24951
34852
44852
54852
64951
74852
84852
94951
104951
115050
125050
135050
145050
155050
164951
175050
185149
195050
205050
215050
225050
235050
244951
254951
265050
274951
284951
294951
305050
314951

Chance of precipitation in August

Any precipitation

Ishigaki gets around 232 mm of rain over 16.6 wet days in August, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 53% and peaks near 56% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
150
251
351
451
551
652
752
852
952
1052
1152
1252
1352
1452
1552
1653
1753
1853
1953
2054
2154
2255
2355
2455
2555
2656
2756
2856
2956
3056
3156

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the miserable band about 94% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
10694
20694
30694
40694
50595
60595
70595
80496
90496
100496
110496
120397
130397
140397
150397
160397
170397
180496
190496
200496
210595
220595
230694
240694
250793
260892
271990
2811089
2911188
3011287
3111386

Wind in August

Winds average 23 km/h in August.

Across August, daily wind ranges from about 22 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
123breezy
223breezy
323breezy
423breezy
523breezy
624breezy
724breezy
823breezy
923breezy
1023breezy
1123breezy
1223breezy
1323breezy
1423breezy
1523breezy
1623breezy
1723breezy
1823breezy
1923breezy
2022breezy
2122breezy
2222breezy
2322breezy
2422breezy
2522breezy
2622breezy
2722breezy
2822breezy
2922breezy
3022breezy
3122breezy

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 06 min at the start of August to 12 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over August. Sunrise moves from 6:15 AM to 6:28 AM, and sunset from 7:24 PM to 6:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.16:157:24
213.16:167:23
313.16:167:23
413.16:177:22
513.16:177:21
613.16:177:21
713.06:187:20
813.06:187:19
913.06:197:19
1013.06:197:18
1113.06:207:17
1212.96:207:16
1312.96:217:16
1412.96:217:15
1512.96:217:14
1612.96:227:13
1712.86:227:12
1812.86:237:11
1912.86:237:11
2012.86:237:10
2112.76:247:09
2212.76:247:08
2312.76:257:07
2412.76:257:06
2512.76:257:05
2612.66:267:04
2712.66:267:03
2812.66:277:02
2912.66:277:01
3012.56:277:00
3112.56:286:59

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.82 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 — August's 5.82 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.0Intense
46.0Intense
56.0Intense
66.0Bright
76.0Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.6Bright
315.6Bright
Planning a trip in August

Hazard calendar for Ishigaki

In seasonPeak

In August, 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 August a good time to visit Ishigaki?

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

4.8
Sightseeing
12th-best month of the year
6.1
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Ishigaki for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Ishigaki in August

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

In August, Ishigaki sees daytime highs around 29°C and nights near 27°C. Pack light clothes and rain gear. Worth having: sun protection and a windbreaker. About 17 days see rain.

light clothesrain gearsun protectiona windbreaker

Sea temperature near Ishigaki in August

The nearest coast averages about 29°C in August — 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 August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 12 (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 August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August 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
August 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).