Monthly climate guide
Ishigaki weather in September
September in Ishigaki is typically hot, with average daytime highs around 29°C (84°F) and night-time lows near 28°C (82°F). The month usually brings about 149 mm of rain (wet) and is often cloudy. Daytime highs are about the same as August and 2°C warmer than October.
What stands out in September
- Seasonally, September counts as early autumn in Ishigaki.
- September is Ishigaki's third warmest month.
- Days and nights are close, only about 1°C apart.
- It's humid — around 80% — so the heat feels heavier.
Avg high
29°C
84°F
Avg low
28°C
82°F
Rainfall
149 mm
wet
Humidity
80%
relative
Sky
61%
cloud · often cloudy
Ishigaki weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 21°C / 70°F | 19°C / 67°F | 69 mm | 77% | 85% |
| February | 21°C / 70°F | 19°C / 67°F | 56 mm | 78% | 80% |
| March | 22°C / 72°F | 20°C / 69°F | 75 mm | 79% | 79% |
| April | 24°C / 75°F | 22°C / 72°F | 105 mm | 81% | 77% |
| May | 27°C / 80°F | 25°C / 78°F | 170 mm | 85% | 76% |
| June | 29°C / 84°F | 28°C / 82°F | 160 mm | 86% | 70% |
| July | 30°C / 85°F | 29°C / 84°F | 119 mm | 83% | 57% |
| August | 30°C / 85°F | 29°C / 84°F | 180 mm | 82% | 62% |
| September | 29°C / 84°F | 28°C / 82°F | 149 mm | 80% | 61% |
| October | 27°C / 80°F | 26°C / 79°F | 104 mm | 78% | 66% |
| November | 25°C / 77°F | 24°C / 75°F | 94 mm | 79% | 78% |
| December | 23°C / 73°F | 21°C / 70°F | 86 mm | 77% | 87% |
What to pack for September
- Light, breathable clothing (cotton or linen)
- A sun hat and high-SPF sunscreen
- A refillable water bottle
- A compact umbrella or packable rain jacket
- Water-resistant shoes
- Quick-dry fabrics — it feels stickier than the temperature suggests
Is September a good time to visit Ishigaki?
Compare the months in the chart above to find your ideal window.
Best time to visit Ishigaki →Other Japan cities in September
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Ishigaki weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/japan/ishigaki/september
<a href="https://weathercompare.eu/weather/japan/ishigaki/september">Ishigaki weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/japan/ishigaki" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Ishigaki weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/japan/ishigaki/september">Ishigaki weather in September</a> – WeatherCompare</p>
Ishigaki in September: quick answers
Is September a good time to visit Ishigaki?
September is one of the wetter months in Ishigaki, with about 149 mm of rain. You can still go: pack a rain jacket and keep plans flexible.
How warm is Ishigaki in September?
Average highs are about 29°C (84°F) and average lows about 28°C (82°F), based on 10 years of daily data.
Does it rain a lot in Ishigaki in September?
Ishigaki typically gets around 149 mm of rain in September — wet.
Figures are long-term averages for the area around Ishigaki (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.