September · Japan
Best time to visit Naoshima in September Weather, crowds & prices
Weather in Naoshima in September
Average temperature 26°C, 120 mm of rain, about 16 days with 6+ hours of sunshine and 81% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
5.3/10
Ranked #10 of 12 months
- Avg temp
- 26°C
- Rainfall
- 120 mm
- Humidity
- 81%
- Days with 6h+ sun
- 16
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $$ · Moderate Cost ($$)
September in Naoshima scores 5.3/10 for sightseeing and cultural travel - ranked #10 of 12. Expect around 26°C, 120 mm of rain, and roughly 16 days with 6+ hours of sunshine this month.
Naoshima is the Seto Inland Sea art island of Yayoi Kusama pumpkins, Tadao Ando museums, and slow ferry rhythms. Best window: late spring through early autumn.
September in Naoshima — middling scores, decent value
September averages 26°C (79°F) and humidity near 81%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 120 mm this is a genuinely wet month: about 16 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 5.3/10 here, 10th of 12 months, against 7/10 in the destination's best month.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Figure on mid-season pricing, with crowds are light for this destination.
Flexible dates? October scores 1.7 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Naoshima in September?
- In September, Naoshima averages 26°C, 120 mm of rain, and about 16 days with 6+ hours of sunshine. Its climate-comfort score is 5.3/10.
- Is September a good time to visit Naoshima?
- September earns a 5.3/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Naoshima in September?
- Expect about 120 mm of rain in September. Average humidity is 81% and there are about 16 days with 6+ hours of sunshine.
Curated in Naoshima
Tickets & experiences
Things to do in Naoshima
Naoshima, Japan. Live activities and tours from GetYourGuide, matched to this destination.