Japan in September: Typhoon Season and Early Autumn

Summer heat lingers early in the month, storms need watching, and by the end of September the air turns noticeably kinder.

Published October 18, 2026 at 9:07 PM JST | By Tokyo Paul

Quick answer: September is a mixed month in Japan. Early September is still hot and humid, and typhoon season is at its peak, so check forecasts and keep plans flexible. Temperatures ease toward the end of the month. Silver Week holidays, moon viewing, red spider lilies and early autumn foods make it rewarding, with lower crowds and better hotel prices.

A month of two halves

The first half of September feels much like late summer. Daytime temperatures in Tokyo, Osaka and Kyoto often remain above 28 degrees Celsius, and humidity stays high. Cicadas are still loud in some areas, and the sun is strong. Many travelers find the early weeks of the month tiring if they plan long days outdoors. By the second half, the air starts to change. Evenings become cooler, humidity falls and the light turns softer. In the mountains and in Hokkaido, autumn comes earlier, and nights can be chilly by late September.

This shift makes the end of the month a good time for walking and sightseeing. Pack for both heat and cool evenings, with light layers and a compact rain jacket. It helps to match activities to the half of the month you will be traveling. Early September suits indoor attractions, aquariums, hot springs and coastal breezes. Late September suits walking tours, gardens, shrines and day trips by train. If your dates are flexible, aim for the last ten days, when the weather is generally more comfortable and the first autumn colors appear in the north.

Understanding typhoon season

Typhoon season in Japan peaks between late summer and early autumn, with September one of the most active months. Typhoons can bring heavy rain, strong winds and high waves, and they sometimes affect trains, flights and ferries. Forecast agencies track storms closely and publish updates several days ahead. For travelers, the practical approach is to stay informed and flexible. Check the weather forecast daily, and follow instructions from your hotel and local authorities. Keep some buffer in your itinerary, especially around flights or long-distance trains. Travel insurance that covers delays can give peace of mind.

If a typhoon is approaching, plan indoor activities, stock up on water and snacks, and avoid coastal areas and rivers. Services usually recover quickly after a storm passes. Most typhoons pass without major impact on a trip, and many only bring a day or two of heavy rain. Trains in Japan are usually well prepared, with scheduled suspensions announced in advance. Check transport company websites and apps for live updates, and look for information in English on major operator pages. Hotels often allow free cancellations when official transport suspensions occur, though policies vary.

Silver Week and holiday dates

Two national holidays fall in September: Respect for the Aged Day on the third Monday and Autumnal Equinox Day around September 22 or 23. In some years, the calendar creates a run of consecutive days off, nicknamed Silver Week. When that happens, domestic travel increases, and trains, hotels and tourist spots are busier.

Check the calendar for the year of your trip. If Silver Week applies, book transport and accommodation early, or aim for a nearby weekend instead. If it does not, September is generally a calm month for tourism. School holidays have ended, and prices at many resorts fall. This can make September a pleasant time to visit popular places with more space.

Moon viewing and red spider lilies

Tsukimi, the custom of moon viewing, takes place around mid to late September or early October, depending on the lunar calendar. People display pampas grass and offer round dumplings called tsukimi dango, and many shrines and gardens hold moon viewing events. Fast food chains even offer limited egg-topped burgers with an autumn moon theme. Around the autumn equinox, red spider lilies, called higanbana, bloom along rice fields, riverbanks and temple grounds. Their bright red flowers appear in a short window, and some places hold viewing events.

One well-known viewing spot is in Saitama Prefecture, where millions of flowers bloom. Please stay on paths and avoid trampling the plants, which are often near farmland. Moon viewing can be enjoyed simply. Find a quiet park, riverside or temple garden after sunset, bring a few rice dumplings or a seasonal sweet, and look up. Many gardens in Kyoto and Tokyo hold special evening openings with lanterns and music for the occasion. Check each venue for dates and ticket details, as events vary from year to year.

Early autumn in the north and the mountains

Autumn arrives first in Hokkaido and the high mountains. The Daisetsuzan range in central Hokkaido is often cited as the earliest place in Japan for autumn leaves, with colors beginning in the second half of September. Hiking is pleasant, but weather can be cold and changeable, so bring warm layers.

In the Japanese Alps, nights can be chilly, and some mountain huts close for the season in late September or October. Check opening dates and weather before planning a hike. In the lowlands, the first signs of autumn include pampas grass and cosmos flowers. Travelers who enjoy quiet scenery may enjoy this period before the main foliage crowds arrive.

Festivals and sports in September

Autumn festivals begin in September. The Kishiwada Danjiri Festival in Osaka Prefecture features large wooden floats pulled through the streets at speed, and it is held in mid to late September in many years. Many local shrines celebrate harvest festivals, with portable shrines and traditional music.

In Tokyo, a grand sumo tournament is held in September at Ryogoku Kokugikan. Tickets are available through official channels and make a memorable outing. Check the schedule and booking rules. Baseball games and outdoor concerts are also pleasant as the weather cools. Verify dates with official sources, as events vary by year.

Seasonal foods and budgeting tips

September brings the first autumn flavors. Chestnuts appear in sweets and rice dishes, and Pacific saury, sanma, begins to show up toward the end of the month, grilled with salt and a squeeze of citrus. Matsutake mushrooms are prized and expensive, with a distinctive aroma. Persimmons and pears are in season. Sweet potatoes and new rice, called shinmai, arrive from the fields. Moon viewing sweets and autumn-themed desserts fill shops. Tea shops and cafes feature chestnut and sweet potato flavors.

Restaurants often introduce seasonal menus in September, so ask what is new. Fresh seafood from northern waters is also good. A good way to taste the new season is to visit a department store food hall or a neighborhood market. Counters display chestnut cakes, sweet potato sweets, pear jellies and new-harvest rice balls. Staff are happy to explain seasonal items, and small portions let you try several flavors. Pair them with hot or iced tea depending on the weather.

September is often a quieter, cheaper month compared with spring and mid autumn. Hotel prices in many areas can be lower, particularly outside holiday periods. Sights such as Kyoto temples are more comfortable than in the peak seasons. Choose flexible bookings where possible, given typhoon risk, and avoid tight connections. Consider travel insurance, and check transport apps for disruption information. If you plan to hike, keep an eye on mountain weather. Pack a compact umbrella, quick-dry clothes and a small towel. Staying adaptable makes the month rewarding.

Frequently Asked Questions

Is September a bad time to visit Japan because of typhoons?

Not necessarily. Typhoons can disrupt travel, but many trips go smoothly. Check forecasts, keep a flexible schedule and consider travel insurance. The second half of the month offers pleasant weather and fewer crowds. Many trips go smoothly, and typhoon warnings are announced several days ahead, giving time to adjust your route.

What is Silver Week?

Silver Week is a run of consecutive holidays that occurs in some years when Respect for the Aged Day and Autumnal Equinox Day are linked by a bridging day. Check the calendar for your year, and book early if it applies. The holiday dates change from year to year, so look at a calendar when planning.

When does autumn foliage start in Japan?

Foliage begins earliest in Hokkaido's high mountains, often in the second half of September. Most of Honshu sees leaf color from late October through November. Daisetsuzan in Hokkaido is often cited as the earliest, while Kyoto and Tokyo peak much later in the season.

Keep Exploring

More guides from Tokyo Paul: Japan in October: Comfortable Weather and Early Color, Japan in August: Obon, Heat and Fireworks and Japan in November: Peak Autumn Foliage.