Weather in Osaka in September
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Compare car hire prices → Affiliate link — we earn a commission at no extra cost to youIn September, Osaka sees average highs of 29.6°C (85.3°F) and lows of 22.1°C. Conditions are hot and very wet, with around 14 rainy days, with roughly 8.9 hours of sunshine a day. It is one of the best months of the year to visit. For the complete picture, see the best time to visit Osaka — every month compared. Once you know when to go, find your Osaka packing list at 247PackingList.
Get ready for Osaka in September
Search flights to Osaka
Compare 100+ airlines for September — one search, best price.
Search Flights →Thermal travel layers
Pack proper layers — winters are genuinely cold and evenings drop fast year-round.
Check Price →What to pack for Osaka in September
- Light layers
- Sunscreen
- T-shirts and light trousers or shorts
- Compact travel umbrella
- Waterproof jacket
- Quick-dry clothing
Compare all months in Osaka
| Month | High | Rain | Rating |
|---|---|---|---|
| January | 9.3°C | 55.7mm | 10/10 |
| February | 10.2°C | 56.9mm | 10/10 |
| March | 15.0°C | 118.6mm | 9/10 |
| April | 18.4°C | 164.6mm | 9/10 |
| May | 22.8°C | 203.8mm | 8/10 |
| June | 26.7°C | 216.3mm | 8/10 |
| July | 30.4°C | 281.2mm | 8/10 |
| August | 32.5°C | 187.8mm | 9/10 |
| September | 29.6°C | 215.1mm | 8/10 |
| October | 22.6°C | 157.9mm | 9/10 |
| November | 17.7°C | 90.7mm | 10/10 |
| December | 11.6°C | 47.3mm | 10/10 |
Full month-by-month guide: best time to visit Osaka →
For facts about Japan — currency, language and dialling code — see our Japan country guide at 247CountryInfo. Travellers also find it useful to keep a Osaka travel guide to hand. Check clothing sizes in Japan before you shop.
Frequently Asked Questions
Is September a good time to visit Osaka?
September rates 8/10 for visiting Osaka — good time to visit. Expect average highs of 29.6°C, 215.1mm of rain across the month and about 8.9 hours of daily sunshine.
What is the temperature in Osaka in September?
In September, Osaka has average highs of 29.6°C (85.3°F) and average lows of 22.1°C (71.8°F).
Does it rain in Osaka in September?
Yes — September is one of the wetter months in Osaka, averaging 215.1mm of rain over roughly 14 rainy days. Pack for heavy showers.
What should I wear in Osaka in September?
For Osaka in September (29.6°C highs / 22.1°C lows), pack light layers plus sunscreen, t-shirts and light trousers or shorts, compact travel umbrella.
More essentials for Osaka in September
Packing cubes
Keep the bag organised whatever the weather — compression cubes for every size.
Check Price →Travel first aid kit
Compact TSA-friendly kit for peace of mind wherever you travel.
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.