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Planning a trip to Japan in September, what kind of clothes should I pack?
How much does the temperature and weather vary by region?
I’m here to answer those questions!
What You’ll Learn in This Guide
☑ Japan’s September weather and average temperatures in major travel destinations.
☑ What to wear in Tokyo, Osaka, Kyoto, Hakata (Fukuoka), Sapporo (Hokkaido) & Okinawa in September.
☑ Clothing tips for a comfortable domestic trip in Japan in September.
The Writer & Trustworthiness of this Article
☑ I’m Japanese, and my name is Hiroyuki.
☑ I lived in Tokyo for 6 years and now live in Osaka.
☑ I stayed in Dallas, Texas for several months.
☑ I use reliable weather data from
・The Japan Meteorological Agency
・The Japan Weather Association
This guide covers September weather and temperature trends and What to Wear in six destinations—Tokyo, Osaka, Kyoto, Hakata, Sapporo, and Okinawa. It also provides outfit tips and Climate comparisons with California, New York, Texas in the U.S.
The following three people let you know the perceived temperature!
■ California
I’m a university student and from San Francisco, California!
I love Japanese pop culture and I’m traveling around Japan alone!
■ New York
I’m from New York City, traveling in Japan with my family to enjoy Japanese culture!
■ Texas
I’m from Dallas, Texas, visiting Japan with my wife to enjoy Japanese food!
Get ready for your Japan trip with this essential September clothing guide!
- What to Wear in Japan 6 Major Cities in September?
- What to Wear in Tokyo in September?
- What to Wear in Osaka in September?
- What to Wear in Kyoto in September?
- What to Wear in Hakata, Fukuoka in September?
- What to Wear in Sapporo, Hokkaido in September?
- What to Wear in Okinawa in September?
- Travel Tips for Domestic Travel in Japan
- Summary / Key Takeaways
What to Wear in Japan 6 Major Cities in September?
September in Japan marks the shift from summer to autumn, with hot and humid days lingering in the first half of the month. Light clothing is essential, but a jacket for cooler evenings is recommended.
What to Wear in Tokyo in September?
Weather trends over the last 5 years
Average temperature over the last 5 years
Tokyo in September is warm and humid with occasional typhoons. Wear breathable clothing and carry a light jacket or umbrella to stay comfortable and prepared for sudden rain.
| Outerwear | a light jacket / cardigan |
| Tops | short sleeves |
| Bottoms | short pants |
| Item | – |
Check the Tokyo annual weather and outfits.
Check details on Tokyo September’s weather and outfits.
Climate comparisons with California, New York and Texas
Still humid, but by late September, it starts feeling more like late summer in LA—finally cooling down!
Still warm, but by late September, it cools down to something like early September in NYC—much more comfortable!
Still hot, like late August in Dallas or Austin, but by late September, it cools down to early September in Texas.
What to Wear in Osaka in September?
Weather trends over the last 5 years
Average temperature over the last 5 years
September in Osaka is hot and humid with occasional typhoon rain. Lightweight, breathable clothing like short sleeves and thin fabrics is recommended, while a light cardigan is useful for air-conditioned places. Carrying a compact umbrella will also keep you comfortable.
| Outerwear | a light jacket / cardigan (In case the AC is too strong in shopping mall) |
| Tops | short sleeves |
| Bottoms | short pants |
| Item | hat and sunglass |
Check the Osaka annual weather and outfits.
Check details on Osaka September’s weather and outfits.
Climate comparisons with California, New York and Texas
Still hot, like August in LA, but starts to cool down a little toward the end of the month.
Still humid, like late August in NYC, but it starts to cool down toward the end of the month.
Still hot, like late August in Dallas, but starts cooling down by the end of the month, feeling more like early September in Texas.
What to Wear in Kyoto in September?
Weather trends over the last 5 years
Average temperature over the last 5 years
September in Kyoto is hot and humid with many sunny days, but typhoons can bring sudden rain and strong winds. Wear lightweight, breathable clothing and carry a foldable umbrella to stay comfortable and prepared.
| Outerwear | a light jacket / cardigan (In case the AC is too strong in shopping mall) |
| Tops | short sleeves |
| Bottoms | short pants |
| Item | hat and sunglass |
Check the Kyoto annual weather and outfits.
Check details on Kyoto September’s weather and outfits.
Climate comparisons with California, New York and Texas
Still hot but slowly becoming bearable! Feels like August in Los Angeles. The humidity gradually decreases, making the heat slightly easier to handle.
Still warm but starting to cool down! Feels like early September in NYC. The humidity remains, but by mid-to-late September, it starts feeling more like fall in Upstate NY.
Still warm but finally cooling off! Feels like late September in Austin or San Antonio. The heat lingers, but by the end of the month, it feels much more comfortable.
What to Wear in Hakata, Fukuoka in September?
Weather trends over the last 5 years
Average temperature over the last 5 years
September in Hakata, Fukuoka is hot and humid with frequent typhoons. Wear breathable clothing with short sleeves or light fabrics, and bring a hat, sunglasses, and a compact umbrella to stay comfortable and prepared.
| Outerwear | a light jacket / cardigan (In case the AC is too strong in shopping mall) |
| Tops | short sleeves |
| Bottoms | short pants |
| Item | hat and sunglass |
Check the Hakata, Fukuoka annual weather and outfits.
Check details on Hakata, Fukuoka September’s weather and outfits.
Climate comparisons with California, New York and Texas
Still hot but starts to feel more like early September in Los Angeles.
Still warm but cooling down—similar to early September in NYC! Humidity lingers but gradually decreases.
Still hot! Similar to late August in Dallas, but by the end of the month, it starts feeling more like early September in Texas.
What to Wear in Sapporo, Hokkaido in September?
Weather trends over the last 5 years
Average temperature over the last 5 years
September in Sapporo, Hokkaido offers mild, sunny weather with lower humidity. Days are warm enough for short sleeves, but mornings and evenings can be cool, so layering is key. A light jacket or cardigan is recommended.
| Outerwear | light jacket / cardigan |
| Tops | long-sleeve T-shirt / light sweater |
| Bottoms | trousers / pants |
| Item | – |
Check the Sapporo, Hokkaido annual weather and outfits.
Check details on Sapporo, Hokkaido September’s weather and outfits.
Climate comparisons with California, New York and Texas
The temperatures start dropping, and it feels like early spring in Los Angeles. The afternoons are still warm, but mornings and evenings get noticeably cooler.
Feels like early September in NYC but with crisper air. Warm during the day, but the nights start getting cooler. You can feel the transition to fall.
September in Sapporo feels like spring or early summer in Dallas! It’s still warm during the day, but the mornings and evenings are noticeably cooler, and autumn comes much earlier than in Texas.
What to Wear in Okinawa in September?
Weather trends over the last 5 years
Average temperature over the last 5 years
September in Okinawa is hot and humid with strong sun and occasional typhoons. Wear breathable clothing with short sleeves, and bring a hat, sunglasses, sunscreen, and a compact umbrella to stay comfortable and prepared.
| Outerwear | – |
| Tops | short sleeves |
| Bottoms | short pants |
| Item | hat and sunglass |
Climate comparisons with California, New York and Texas
Still hot! It feels like July in Los Angeles, but with more moisture in the air, making it feel much heavier than a San Francisco summer. Evenings start to cool down slightly.
Still feels like summer, with temperatures similar to NYC in July. While New York starts to cool down in September, Okinawa remains hot and humid, making it feel much more like midsummer than early fall.
Still very hot, similar to July in Dallas. But unlike Texas, where fall starts creeping in, Okinawa still feels like full summer, with high humidity making it feel even warmer.
Check the Okinawa annual weather and outfits.
Check details on Okinawa September’s weather and outfits.
Travel Tips for Domestic Travel in Japan
- Hokkaido – Mild autumn weather with daytime highs of 68–77°F (20–25°C). Mornings and evenings can drop below 59°F (15°C), so a light jacket or long sleeves are recommended.
- Tokyo, Osaka, Kyoto, Fukuoka (Central & Southern Japan) – The first half of September still feels like summer, with temperatures exceeding 86°F (30°C), but it gradually cools down later in the month.
- Okinawa – Still hot (around 86°F / 30°C) with high humidity, feeling like midsummer. September is also peak typhoon season, so flight delays and cancellations are common.
- September is one of the most active typhoon months, especially affecting Okinawa, Kyushu, Shikoku, and southern Honshu.
- Typhoons can cause flight cancellations, Shinkansen delays, and disruptions to public transport.
- Check the weather forecast frequently and allow flexibility in your travel schedule.
- Recommended Typhoon Preparation Items
- Portable battery pack (for potential delays or power outages)
- Waterproof bag (to protect electronics and documents)
- Compact umbrella or rain poncho (for sudden downpours)
- Snacks & bottled water (in case of long wait times)
- The first half of September remains hot in Central & Southern Japan, so heatstroke prevention and sun protection are still necessary.
- Temperatures drop later in the month, and mornings/evenings become cooler, so a light jacket or sweater is useful.
- Hokkaido cools down significantly, and shorts/t-shirts may not be enough—pack long sleeves for comfort.
- Recommended Heat & Temperature Transition Items
- Hat & sunglasses (for UV protection in early September)
- Sunscreen (SPF 50+ recommended) (as the sun is still strong)
- Light, breathable clothing (linen, cotton, moisture-wicking fabrics) (for the hot and humid start of the month)
- Light jacket or cardigan (for cooler mornings and evenings, especially in Hokkaido and northern Japan)
- September weather can be unpredictable, so having a compact umbrella or lightweight rain jacket is helpful.
- Quick-dry clothing is ideal for humid or rainy days and makes travel more comfortable.
- If visiting Hokkaido, bring at least one long-sleeve or lightweight sweater for cooler mornings/evenings.
- For Central/Southern Japan or Okinawa, still prepare for heat, but also have a light outer layer for late September.
- If traveling from Hokkaido to Central/Southern Japan, prepare for a noticeable temperature and humidity increase.
- As late September brings cooler weather, those visiting Hokkaido or northern Japan should bring autumn-friendly clothing.
- When traveling by plane or Shinkansen, typhoons can cause cancellations or delays. Check the typhoon forecast in advance and allow flexibility in your flight and travel schedule to avoid disruptions.
- This site will also provide typhoon updates and travel advisories, helping you stay informed about potential disruptions and ensuring a smoother journey.
- Consider doing laundry locally to minimize how much you need to pack!
- If visiting Japan in late September, check the “October Clothing Guide” to prepare accordingly.
Travel Comfortably Between Cities
With a Japan Rail Pass, you can enjoy smooth and hassle-free travel on bullet trains and local trains.
Summary / Key Takeaways
- Weather varies significantly by region – Early September remains hot (86°F+ / 30°C+) in Central & Southern Japan, while Hokkaido cools down (68–77°F / 20–25°C) with chilly mornings and evenings.
- Typhoon season peaks in September, particularly in Okinawa, Kyushu, and southern Japan. Flights and Shinkansen may experience delays or cancellations, so check forecasts and have flexible travel plans.
- Heat and humidity remain in early September, so light, breathable clothing is necessary, but late September requires a light jacket, especially in the north.
- If traveling from Hokkaido to Central/Southern Japan, prepare for a significant increase in temperature and humidity.
- Rainy weather is possible, so carrying a compact umbrella or light rain jacket is helpful.
With proper preparation, you can enjoy Japan’s transition into autumn, scenic landscapes, and seasonal events while staying comfortable and avoiding travel disruptions!
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