In September, Japan transitions from summer to fall, quietly bidding farewell to the warm weather and welcoming the first signs of the new season. The days are still warm and humid, the sky is clear and bright, and the mornings are fresh and cool. The evenings are even more tranquil as nature begins its gradual transformation.
In Hokkaido, September temperatures reach 17°C (63°F), cooling down faster than in other regions. In central Japan, including Tokyo and Kyoto, as well as at the southernmost tip of Okinawa, temperatures range from 81 to 86°F (27 to 30°C), with the lingering heat of late summer still present.
There may be occasional rain and typhoon remnants early in the month, but the weather is generally stable and pleasant in mid-to-late September, making it ideal for exploring city streets and rural paths.
Table of Contents
Is it good to travel to Japan during the weather in September?
Japan Weather Snapshot in September
Seasonal Highlights in September 2025 (Landscape & Events)
Taste the Harvest: Japan's Autumn Bounty Begins in September
What to Wear and Pack for Japan in September
FAQ about September Weather in Japan
1. Is it good to travel to Japan during the weather in September?
Nationwide Temperature Trends: It's Not Quite Autumn Yet
Although the calendar may show that fall is just around the corner, September in Japan usually still feels like summer, especially during the first half of the month.
In mid-September of 2024, temperatures hit 30°C (86°F) or higher at over 600 weather stations.
In September, daytime highs in Tokyo or Kyoto can reach 81-86°F (27-30°C), and it is slightly cooler at night.
Osaka can still be hot in September, especially when walking around outdoor temples and cities.
However, Hokkaido takes on a cooler, autumnal air with average temperatures ranging from 17 to 22°C (63 to 72°F). This makes it one of the few places with early fall weather in September.
Watch Out for Early September Showers
September wraps up Japan's typhoon season, and while major storms are rare, brief rain and sudden weather changes are common, especially in the first two weeks.
Okinawa and Kyushu are more likely to be affected, but local systems handle disruptions efficiently.
Rain usually comes and goes quickly; a humid morning can turn into a clear afternoon, so it's smart to carry a small umbrella and keep your plans flexible.
By mid to late September, skies clear up and humidity drops, particularly around Tokyo and Kyoto.
2. Japan Weather Snapshot in September
A quick look at major destinations across Japan as summer fades and autumn quietly begins:
September Weather in Hokkaido｜Cool & Breezy Escape
Avg. Temp: 22–26°C (71–79°F)
Night Chill: Drops to 10–17°C
Tip: Light jacket & sneakers recommended
✅ A cooling resort in Japan
✅ Ideal for early autumn seekers
✅ Crisp air, clear skies, and fewer crowds
September Weather in Tokyo｜Summer Hangs On, Comfort Creeps In
Avg. Temp: 24–30°C (75–86°F)
Humidity: High early in the month
Tip: Lightweight clothes + small umbrella
✅ Great for cultural exploration
✅ Pleasant for late-night city strolls mid-month onward
September Weather in Osaka｜Zansho(late summer) Heat Still Strong
Avg. Temp: 22–30°C (72–86°F)
Tip: Sunscreen, water bottle, and portable fan
✅ Outdoor sites like Osaka Castle = hot walks
✅ Best to explore in the early morning or evening
September Weather in Kyoto｜Warm Days, Autumn Nights
Avg. Temp: 21–30°C (70–86°F)
Tip: Long sleeves for night strolls by Kamogawa
✅ Perfect for night festivals & moon viewing
✅ Sweat-prone during daytime temple visits
September Weather in Fukuoka｜Hot & Humid with Occasional Showers
Avg. Temp: 22–31°C (72–88°F)
Tip: Rain protection + breathable layers
✅ Ideal for combining beach & indoor plans
✅ Early fall seafood is in season
September Weather in Okinawa｜Summer Never Ends
Avg. Temp: 26–31°C (79–88°F)
Tip: Swimsuit, rash guard, & typhoon watch
✅ Best for snorkeling, diving, and island hopping
✅ Hotspot for "endless summer" seekers
September Weather Comparison Table
| Destination | Avg. Temp (°C) | Night Temp (°C) | Climate Feel | Key Tips |
| Sapporo | 22-26 | 10-17 | Cool, refreshing | Light jacket, sneakers |
| Tokyo | 24-30 | 18-22 | Hot early, mild late | Umbrella, T-shirts, thin layers |
| Osaka | 22-30 | 20-24 | Hot, humid | Sunblock, fan, water bottle |
| Kyoto | 21-30 | 18-22 | Warm days, cool nights | Long sleeves for evenings |
| Fukuoka | 22-31 | 20-23 | Humid, scattered rain | Raincoat, bug spray |
| Okinawa | 26-32 | 24-26 | Tropical & humid | Swimwear, typhoon watch |
If you want to escape the heat in Japan in September, head to Hokkaido. Take a walk through the flower fields of Furano, enjoy some buttermilk ice cream, and visit the penguins at Asahiyama Zoo.
If you prefer a more relaxed island vacation, Okinawa is ideal for snorkeling, water skiing, and sunbathing. At night, enjoy fireworks and ocean breezes.
In early fall, Fukuoka in Kyushu welcomes travelers with comfortable temperatures and a leisurely pace. Climbing up the Seaside Tower and strolling through Ohori Park is a relaxing daytime activity. At night, the yatai stalls bustle with ramen, mentaiko, and fresh seafood.
If you're visiting Japan for the first time, don't miss the classics of Tokyo and Osaka (and Kyoto), which offer a blend of the modern and historic with surprising cultural crossroads.
Would you like more information about the weather in Japan in September? Visit the Japan Meteorological Agency's official website for more information.
3. Seasonal Highlights in September 2025 (Landscape & Events)
Hokkaido offers a cool retreat and early fall foliage:
Osaka hosts the exciting Kishiwada Danjiri Festival:
Okinawa is still perfect for swimming and beach lovers:
Kishiwada Danjiri Festival 2025 (岸和田だんじり祭)｜Osaka｜September 13–14, 2025
Renowned as one of Japan's most intense traditional festivals, the Kishiwada Danjiri Festival is a high-energy spectacle that celebrates strength, courage, and team spirit. Each massive wooden float (danjiri) is a handcrafted masterpiece, taking up to a year to complete, and weighing as much as 4 tons. Over 100 local men in traditional attire pull a single float at full speed through the narrow streets of Kishiwada, Osaka - racing around tight corners with breathtaking precision.
Dates: September 13–14, 2025 (Saturday-Sunday), held annually on the weekend before Japan's Respect for the Aged Day.
Location: Kishiwada City, Osaka Prefecture (Accessible via the Nankai Line to Kishiwada Station or Haruki Station)
What to Expect:
Of course, there have also been past years when danjiri floats collided with utility poles or clipped the edges of nearby buildings, a testament to just how intense and unpredictable the event can be.
Don't miss the vibrant festival stalls lining the pedestrian-only streets around the Kishiwada Danjiri parade route! Grilled yakitori, takoyaki sizzling on hot plates, traditional Japanese masks on display, goldfish scooping, and retro-style carnival games all come together to create a festive, nostalgic atmosphere. It's an immersive celebration of local culture where families, friends, and curious travelers can savor authentic street flavors and join in the lively spirit of a true Japanese matsuri.
As night falls, the tempo slows and the floats are beautifully illuminated with lanterns, creating a striking contrast between the daytime’s fierce energy and the evening's calm elegance.
Best Viewing Spots:
Around Kishiwada Station - the main festival area with the largest crowds and liveliest scenes
Around Haruki Station - slightly less crowded, but still full of excitement
Travel Tips:
Plan your route in advance and arrive early to secure a spot near the float turning points or central plazas, where the action is most intense. Trains on the Nankai Line offer direct access from central Osaka. Expect large crowds, and don’t forget to wear your sunglasses, bring water, sun protection, and comfortable shoes to enjoy the day.
ULTRA JAPAN 2025: Tokyo's Ultimate Electronic Music Festival｜September 13–14, 2025
Ultra Japan is one of Asia's largest urban EDM festivals, now celebrating its 10th anniversary. Held on the iconic Odaiba waterfront, the two‑day spectacle brings together global DJs, immersive stage designs, and festival energy that pulses well into the evening. (View more information on the official website)
Festival Highlights
A multisensory experience: high-impact lighting, LED installations, smoke cannons, pyro effects, and firework finales.
Chill areas with air-cushion lounges and picnic zones between sets.
Food trucks & bars, international cuisine, and official merch stalls for ultimate festival conveniences.
Strong focus on environmental initiatives—recycling stations and reusable cups promote a greener footprint.
Gates open at 10 AM, performances run from 11 AM–9 PM each day.
Evening closes with a spectacular fireworks display over the main stage.
Schedule
Gates open at 10 AM, performances run from 11 AM–9 PM each day.
Evening closes with a spectacular fireworks display over the main stage.
Venue: ODAIBA ULTRA PARK
Headliners Light Up the Ultra Japan 2025 Lineup
(Image from the Ultrasonic official website.)
Main Headliners: Kelvin Harris/DJ Snake/ Hardwell/ Martin Garrix and other artists
Like this event? We can add it to your itinerary and handle the ticket booking for you. Contact us to reserve the ticket right now.
4. Taste the Harvest: Japan's Autumn Bounty Begins in September
September marks the gentle arrival of autumn in Japan. It's a season of abundance and flavor.
Freshly harvested chestnuts (kuri) are at their sweetest, and each golden kernel symbolizes the season's richness. Now is the perfect time to indulge in chestnut-based treats that bring warmth and nostalgia with every bite.
Meanwhile, Japan's coastal waters offer a bounty of seafood not to be missed. Pacific saury (sanma), red sea bream (tai), salmon, and early-season tuna are all at their seasonal best—plump, flavorful, and packed with umami.
A hearty kaisendon (seafood rice bowl) layered with the day's freshest catch and paired with fluffy rice and seasonal side dishes is an edible celebration of autumn's arrival.
Autumn's Sweet Treasure: Discovering Japan's Beloved Kuri (Chestnuts) in September
Chestnuts begin appearing in wagashi (traditional sweets), rice dishes, and even tempura in September. From kuri-gohan (chestnut rice) to Mont Blanc cakes and candied chestnuts, this humble nut brings a soft, creamy richness to fall menus.
Harvest season: Mid–late September
Where to try: Kyoto dessert shops, countryside farm cafés, or join a chestnut picking experience in Nara or Osaka countryside.
Check the location in Kyoto, Japan
Check the location of this store in Shinjuku-ku, Tokyo
Savor the Flavors of the Sea: Japan's September Seafood Highlights
September in Japan is a treasure trove for seafood lovers. As the country transitions from summer to autumn, its coastal waters offer up rich seasonal catches that define the culinary experience of early fall.
Pacific saury (sanma), a beloved autumn delicacy, is typically grilled with salt and paired with grated daikon—an iconic taste in September.
Red sea bream (tai) and oysters also reach peak flavor this month, known for their clean, umami-packed profiles.
Fall salmon is especially rich and fatty, ideal for dishes like sushi and hotpot. Early autumn tuna, having fed all summer, develops a firmer texture and deeper taste, making it a standout for sashimi lovers.
In September, Japan's seafood offers a rich harmony of seasonal flavors and local craftsmanship, be it at a Michelin-starred restaurant or a humble seaside stall.
5. What to Wear and Pack for Japan in September
In many parts of Japan, September still carries lingering heat and humidity. To stay comfortable during your travels:
Wear breathable clothing such as dry-fit T-shirts or lightweight jackets.
Linen fabrics are highly recommended—they are airy, soft, and help prevent discomfort from stuffiness or overheating during daily activities.
If you're heading to Hokkaido, note that temperatures can vary significantly between day and night. Be sure to pack a light cardigan or a thin jacket for cooler mornings and evenings—these layers will come in handy.
Prepare for Sudden Showers and Typhoon Remnants
Early September may bring brief showers or residual effects of typhoons. It's wise to bring:
These will help you stay dry without adding bulk to your daypack.
Don't Forget Mosquito Protection
Mosquitoes remain active in many outdoor areas during September, especially if you're hiking or joining a festival. We suggest bringing:
Mosquito repellent spray (e.g., Skin Vape, widely available at drugstores and convenience stores in Japan—just spray on exposed skin before heading out)
Soothing anti-itch solution (like Muhi roll-on, perfect for relieving any bites)
Extra Comfort with Our Private Car Tours
For added comfort, our private car tours ensure that you can enjoy cool, air-conditioned transfers between destinations.
Book your customized private itinerary with driver and guide at least 3–6 months in advance to secure a smooth and relaxing journey across Japan.
6. FAQ about September Weather in Japan
(1)Will I encounter typhoons in September when traveling to Japan?
Typhoons can occur in September, but major disruptions are rare. In September 2024, there were 4 typhoons, with only one briefly affecting Japan in early September.
Travelers typically experience little to no impact. To stay safe, check weather updates, pack a compact umbrella, and stay in touch with your travel consultant. If you book with UME Travel, our team will adjust your itinerary if needed to ensure smooth travel.
(2)Where will we stay when traveling in Japan?
√At UME Travel, we curate exceptional accommodations tailored to your expectations and budget. Whether you prefer elegant 4-star boutique hotels or premium international luxury brands, our Asia travel experts select each property with care, prioritizing comfort, design, convenience, scenic surroundings, and exceptional service. Many options include breakfast and prime access to cultural, shopping, or business districts, ensuring every aspect of your stay reflects your taste and lifestyle.
(3)Are crowds a problem in September?
Compared to spring and fall peak seasons, September is noticeably less crowded, making it a great time to visit popular attractions.
However, early September can still be hot and humid, especially in cities like Osaka or Fukuoka. Dress light, stay hydrated, and consider scheduling outdoor activities in the morning or evening.
Bonus tip: While crowds are fewer, some popular restaurants and cultural shows may still require advance reservations, especially on weekends or holidays like Respect for the Aged Day.
(4)Are there any public holidays or closures in September?
Yes. Japan has two national holidays in September 2025:
On these days, government offices, banks, and post offices will be closed. Most shops, restaurants, and tourist attractions stay open. Museums may shift their closed day to Tuesday if Monday is a holiday.
There's no extended holiday (Silver Week) in 2025, so closures are limited to those specific dates.
What We'd Like to Say
September in Japan is a quiet treasure, where summer's final warmth meets the first whispers of fall. With fewer crowds, cooler evenings, and a calendar full of seasonal flavors and cultural events, it's the perfect time to see Japan in a softer, more intimate light.
Whether you're chasing festivals, tasting fresh sanma, or simply strolling under the early red leaves of Hokkaido, Japan, in September, it offers something beautifully in-between and entirely unforgettable.
Do you have more ideas for personalizing your September itinerary in Japan? Contact us today for a free one-on-one consultation.