September · Japan
Best time to visit Osaka in September Weather, crowds & prices
Weather in Osaka in September
Average temperature 25°C, 210 mm of rain, about 16 days with 6+ hours of sunshine and 85% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
4.6/10
Ranked #11 of 12 months
- Avg temp
- 25°C
- Rainfall
- 210 mm
- Humidity
- 85%
- Days with 6h+ sun
- 16
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Osaka scores 4.6/10 for sightseeing and cultural travel - ranked #11 of 12. Expect around 25°C, 210 mm of rain, and roughly 16 days with 6+ hours of sunshine this month.
Street-food neon, castle grounds, and canal nights peak from May through September.
September in Osaka — off-season conditions
At 25°C (76°F) this is comfortable city weather in September, with sightseeing easiest before lunch and after the afternoon peak.
Expect monsoon-level rainfall at 210 mm: only about 16 days with 6+ hours of sunshine across the month, and stretches of heavy rain are normal.
That is 4.6/10 on the same scale — 11th of 12 months, versus 6.2/10 for the best month here.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella.
Expect low-season pricing, and crowds are light for this destination.
If your dates are flexible, December is materially better in Osaka — 1.6 points higher on the same scale.
Frequently asked
- What is the weather like in Osaka in September?
- In September, Osaka averages 25°C, 210 mm of rain, and about 16 days with 6+ hours of sunshine. Its climate-comfort score is 4.6/10.
- Is September a good time to visit Osaka?
- September earns a 4.6/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Osaka in September?
- Expect about 210 mm of rain in September. Average humidity is 85% and there are about 16 days with 6+ hours of sunshine.
Curated in Osaka
Tickets & experiences
Things to do in Osaka
Osaka, Japan. Live activities and tours from GetYourGuide, matched to this destination.