Weather in Japan in September

September is the perfect month for more relaxed sightseeing, thanks to its quieter vibe and more comfortable weather. The weather in Japan in September cools off in the northern parts first and the initial traces of fall foliage appear. This time of year is wonderful for savoring the fall’s freshly harvested rich produce, which especially showcases grapes and pears. Even though typhoons might bring occasional rain, festivities continue in places like Tokyo and Osaka, such as Kishiwada Danjiri Matsuri, which is a fun way for visitors to gain valuable cultural insights.

Japan in September at a glance

As the very first hints of fall appear in the northern regions throughout September, conditions in the middle regions still remain warm. The early typhoon season may bring rain on occasion.

• In September, central Japan's average temperatures range from 70°F to 86°F (21°C to 30°C), while Hokkaido cools down to around 59°F to 75°F (15°C to 24°C). Okinawa remains the warmest destination, experiencing about 79°F to 88°F (26°C to 31°C).
• September is an ideal time for city sightseeing, hiking in cooler northern regions, or enjoying traditional festivals like Kishiwada Danjiri Matsuri in Osaka. Seasonal produce, such as mushrooms and chestnuts, begin to pop up on restaurant menus.
• Once the summer tourists have departed in early fall, there is a more peaceful vibe across the country. Coupled with pleasant weather, Japan in September is one of the best times to see the highlights without having to fight your way through hordes of people.

Is September a good time to visit Japan?

Meteorological fall runs from September to November in Japan and the turning of the leaves is its signature, although summer vibes still linger on in the air in September. The weather in Japan in September sees summer temperatures remaining across some parts of the country, although it cools down quite a bit in the north. The typhoon season arrives in September, which means you should anticipate occasional rain, but many areas remain reasonably dry.

The countryside is relatively peaceful during this time, making September an ideal month for enjoying the great outdoors. Hiking paths in Hokkaido and the Japanese Alps become especially colorful when the leaves turn lovely shades of orange, red, and yellow. The sea is still warm, so a day at the beach remains a possibility.

Harvest festivals and festivities, such as the Kishiwada Danjiri Matsuri, enrich the culture. Seasonal delicacies such as chestnuts and matsutake mushrooms characterize Japan's cuisine in fall. Overall, September's mix of cultural activities, an early display of fall colors, and fewer crowds make it an ideal month for a relaxing and enriching vacation.

Average daily temperatures in September

In contrast to the hot summer months, Japan in September cools down a little, and the humidity decreases as the month passes. In central Japan, including Tokyo, daytime temperatures range from 79°F to 86°F (26°C to 30°C), while evenings drop to 68°F to 73°F (20°C to 23°C). Kyushu and Shikoku have highs of 82°F and 89°F (28°C to 32°C) and lows of 73°F to 77°F (23°C to 25°C). 

Okinawa remains the warmest area, with average highs of 87°F (31°C) and lows around 79°F (26°C). While Hokkaido in the north displays the earliest indications of cooling off, with highs ranging from 70°F to 77°F (21°C to 25°C) and lows of around 54°F to 61°F (12°C to 16°C).

What about the crowds and cost in September?

Travelers to Japan in September can enjoy manageable crowd levels, lower costs, and breathtaking changing landscapes during this transitional month – perfect for enjoying Japan and saving money.

After the summer rush, September provides a nice lull with fewer visitors at major destinations, especially when exploring city attractions. Although the typhoon season can occasionally disrupt travel plans, the weather is still warm overall. September is an appealing month to visit if you’re on a budget because airfares and accommodations are usually cheaper than in the summer months.

Things to do in Japan in September

The weather in Japan in September offers a charming mix of summer warmth and early fall freshness that creates a dynamic backdrop for natural exploration. Here are some of the best things to do in Japan in September to get the most out of your trip.

Hike the Nakasendo Trail

The Nakasendo Trail, a historic route connecting Kyoto and Tokyo, offers a journey through Japan’s scenic countryside. September’s cooler weather makes it an ideal time to walk between well-preserved mail towns like Magome and Tsumago, where visitors can experience traditional inns, tea houses, and Edo-period architecture. The surrounding forests and mountain paths begin to show early fall shades, adding to the trail’s charm.

Visit Lake Towada and Oirase Gorge

In the Tohoku region, Lake Towada and the Oirase Gorge offer breathtaking natural beauty. September’s milder weather enhances the experience of walking or cycling along the Oirase Stream, which is flanked by waterfalls, moss-covered rocks, and verdant trees. A boat cruise on Lake Towada provides stunning views of the serene waters surrounded by lush greenery, a tranquil escape from the cities.

Relax at Kusatsu Onsen

Kusatsu Onsen, one of Japan’s most famous hot spring towns, is particularly inviting in September. The town’s higher altitude brings crisp, cool air, perfect for soaking in its mineral-rich waters. The Yubatake (hot water field) in the town center is a must-see, offering a visual representation of the geothermal energy that fuels the onsen. Enjoy a stroll through the streets and sample traditional onsen tamago (eggs cooked in hot spring water).

Discover the Iya Valley

Shikoku’s Iya Valley, with its steep gorges and vine bridges, offers an adventurous retreat in September. Hike the scenic trails, raft down the Yoshino River, or simply enjoy the lush greenery that begins to transition to warm fall tones.

Festivals and events in Japan in September

September is the month when Japan glides from summer to fall. You can have the best of both worlds with quintessential events and festivals that celebrate the arrival of fall and seasonal delicacies.

• Kishiwada Danjiri Matsuri: In Osaka, participants race massive wooden floats through the streets, showcasing skill and strength in this high-energy festival.
• Takayama Fall Festival: Similar to its spring counterpart, this Gifu festival features elaborately decorated floats and a serene, historic atmosphere.
• Otsukimi (moon viewing): September’s full moon is celebrated with traditional tea ceremonies and moon-viewing parties at locations like Kyoto’s Daikaku-ji Temple.