What to pack for Osaka in September
- light, breathable clothing
- sun protection (hat, SPF 50)
- a compact umbrella or rain shell — rain is frequent
Humidity averages 76%; max daily wind around 21 km/h.
How September compares
Best months in Osaka: April–May & October–November. See the full best time to visit Osaka guide.
Osaka in September: the details
In September, Osaka sees average daytime highs of 30°C (86°F) and overnight lows of 23°C (73°F). Rainfall totals roughly 167 mm across 13.2 rainy days, and the sun shines about 9.3 hours per day with 12.2 hours of daylight mid-month. Relative humidity averages 76%.
In context: September is the third-warmest month and the 6th-wettest in Osaka. The sunniest month is August (10.4 h/day).
| Metric | September average |
|---|---|
| Daytime high | 30°C / 86°F |
| Overnight low | 23°C / 73°F |
| Rainfall | 167 mm over 13.2 rainy days |
| Sunshine | 9.3 h/day (12.2 h daylight) |
| Humidity | 76% |
| Travel score | 5.8 / 10 |
These figures are climate normals computed from the ERA5 weather reanalysis (2019–2024) for Osaka, Japan (34.69, 135.5) — see our methodology. Actual conditions vary year to year.
Not set on Osaka? Browse the best places to visit in September ranked by travel score.
Frequently asked questions
How hot is Osaka in September?
Daytime highs in Osaka in September average 30°C (86°F); nights drop to about 23°C.
Does it rain in Osaka in September?
Expect around 13.2 rainy days and 167 mm of rainfall in September.
Is September a good time to visit Osaka?
September is a fair shoulder-season month in Osaka — decent conditions with some trade-offs. Overall travel score: 5.8/10. The best months are April–May & October–November.
Also good in September, near Osaka
Where should you go next month?
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