Ishigaki in Summer
In summer (June, July and August), Ishigaki sees average daytime highs around 28°C and overnight lows near 27°C, with 521 mm of rain over about 44 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 28°C. The sky is clear or mostly clear about 30% of the time across summer, and the air most often feels miserable.
Summer is Ishigaki's weakest season of the year to visit on our travel score. For the whole year in context, see Ishigaki's year-round climate.
- Avg daytime high
- 28°C
- warmest season of the year
- Avg overnight low
- 27°C
- Rainfall
- 521 mm
- 44 wet days
- Avg wind
- 24 km/h
- Travel score
- 5.1
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Ishigaki in Summer
Across summer, daytime highs hold fairly steady around 28°C.
A typical summer day in Ishigaki reaches about 28°C and drops to 27°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Ishigaki
Once humidity and wind are folded in, summer brings about 82 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Ishigaki weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 21° / 19° | 155 | 16.8 | 10.7 | 5.2 |
| Feb | 21° / 19° | 112 | 13.9 | 11.2 | 5.4 |
| Mar | 22° / 20° | 122 | 13.9 | 11.8 | 5.9 |
| Apr | 24° / 22° | 148 | 13.1 | 12.6 | 6.3 |
| May | 26° / 25° | 165 | 14.4 | 13.2 | 5.9 |
| Jun | 28° / 27° | 161 | 14.2 | 13.5 | 5.2 |
| Jul | 29° / 28° | 128 | 13 | 13.4 | 5.2 |
| Aug | 29° / 27° | 232 | 16.6 | 12.8 | 4.8 |
| Sep | 28° / 27° | 223 | 15.8 | 12.2 | 5.3 |
| Oct | 26° / 25° | 140 | 13.7 | 11.4 | 6.1 |
| Nov | 25° / 23° | 145 | 14.1 | 10.8 | 6.2 |
| Dec | 22° / 20° | 154 | 15.3 | 10.5 | 5.7 |
Cloud cover in Summer
The sky is clear or mostly clear about 30% of the time across summer.
Chance of precipitation in Summer
Ishigaki gets around 521 mm of rain over 44 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 24 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 24 min in early June to 12 h 30 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.0 kWh/m².
Hazard calendar for Ishigaki
In summer, Ishigaki overlaps 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.
Is summer a good time to visit Ishigaki?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer 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 Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Ishigaki sees daytime highs around 28°C and nights near 27°C. Pack light clothes, rain gear and sun protection. Worth having: a windbreaker. About 44 days see rain.
Sea temperature near Ishigaki in Summer
The nearest coast averages about 29°C across summer — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 23 | 23 | 23 | 25 | 26 | 28 | 29 | 29 | 28 | 27 | 26 | 25 |
| Comfort | Refreshing | Refreshing | Refreshing | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Warm | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 23 | Refreshing |
| Feb | 23 | Refreshing |
| Mar | 23 | Refreshing |
| Apr | 25 | Warm |
| May | 26 | Warm |
| Jun | 28 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 28 | Tropical |
| Oct | 27 | Warm |
| Nov | 26 | Warm |
| Dec | 25 | Warm |
UV index in Ishigaki in Summer
Clear-sky midday UV across summer averages 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 6 | 8 | 10 | 9 | 10 | 12 | 12 | 12 | 11 | 8 | 7 | 5 |
| Level | High | Very high | Extreme | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Very high | High | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 6 | High |
| Feb | 8 | Very high |
| Mar | 10 | Extreme |
| Apr | 9 | Very high |
| May | 10 | Very high |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 12 | Extreme |
| Sep | 11 | Extreme |
| Oct | 8 | Very high |
| Nov | 7 | High |
| Dec | 5 | High |
Air quality in Ishigaki in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 11 | 12 | 15 | 13 | 9 | 7 | 8 | 9 | 8 | 9 | 10 | 11 |
| Level | Good | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 12 | Moderate |
| Mar | 15 | Moderate |
| Apr | 13 | Moderate |
| May | 9 | Good |
| Jun | 7 | Good |
| Jul | 8 | Good |
| Aug | 9 | Good |
| Sep | 8 | Good |
| Oct | 9 | Good |
| Nov | 10 | Good |
| Dec | 11 | Good |
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.
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
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.