Researched guide · Checked on Nov 5, 2026
September in Tokyo is still hot at first and is one of the rainiest months, with the peak of typhoon season around Tokyo. It also brings the September grand sumo tournament and two public holidays. Here is the weather, what’s on in September 2027, and tips for your trip.
Quick answer
Weather: average high 28°C (82°F), low 20°C (68°F), and 225 mm (8.9 in) of rain. Highs drop from about 30°C on September 1 to about 25°C on September 30.
Sumo: the September tournament at Ryogoku Kokugikan runs September 12–26, 2027. Tickets go on sale August 7.
Holidays: Respect for the Aged Day (September 20) and Autumnal Equinox Day (September 23, 2027).
Typhoons: around Tokyo, September is the peak month.
Tokyo weather in September
September has an average high of 28°C (82°F), a low of 20°C (68°F) and 225 mm (8.9 in) of rain. It starts hot, but late September is about 5°C cooler. The rain does not ease during the month, and average humidity is 75%. See Tokyo weather by month.
| Date | Average high | Average low | Average sunshine |
|---|---|---|---|
| September 1 | 30.0°C (86°F) | 22.5°C (73°F) | 4.8 hours |
| September 15 | 27.7°C (82°F) | 20.5°C (69°F) | 4.2 hours |
| September 30 | 24.7°C (76°F) | 17.6°C (64°F) | 3.8 hours |
What to wear in September
- Early September: light summer clothes, as highs are around 30°C.
- Late September: summer clothes still work by day. Bring a thin layer for the evening, when lows fall below 20°C.
- All month: carry a small umbrella or rain jacket, and shoes that can get wet.
September grand sumo tournament (September 12–26, 2027)
The September tournament is the last of the three Tokyo tournaments at Ryogoku Kokugikan. In 2027 it runs from Sunday, September 12 to Sunday, September 26, according to the Japan Sumo Association. Advance tickets go on sale on August 7, 2027, and weekends sell out fast. See sumo in Tokyo and our Ryogoku guide.
Typhoon season
In the Kanto region around Tokyo, about three typhoons a year come close on average, most often in September. They can stop trains and flights for a day, so keep your plans flexible, check the news, and stay indoors while one passes. See typhoons in Tokyo.
Public holidays in September 2027
- September 20 (Mon): Respect for the Aged Day, a three-day weekend.
- September 23 (Thu): Autumnal Equinox Day. Senso-ji holds its autumn Higan service around the equinox.
- See Japan public holidays.
Flowers and the end of summer
- Showa Kinen Park: cosmos from late September to mid-October.
- Mt. Fuji climbing ends in early September (September 10 in 2026). Check the official site for 2027.
Tips for September
- Keep a flexible day in case a typhoon stops trains.
- Plan indoor options for rainy days. See Tokyo when it rains.
- Still dress for heat in early September.
Month by month: ← Tokyo in August · Tokyo in October → · All 12 months
Find hotels in Tokyo for September
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FAQ
Is September a good time to visit Tokyo?
It can be, especially for sumo, but it is still hot early in the month, very rainy, and the peak of typhoon season around Tokyo. Keep your plans flexible.
What is the weather like in Tokyo in September?
Hot and wet: an average high of 28°C and a low of 20°C, with 225 mm of rain.
Is early or late September better in Tokyo?
Late September is cooler: average highs fall from about 30°C on September 1 to about 25°C on September 30. Rain and typhoons remain possible all month.
What should I wear in Tokyo in September?
Light summer clothes, with a thin layer for late September evenings. Carry a small umbrella or rain jacket.
When is the September sumo tournament in 2027?
September 12–26, 2027, at Ryogoku Kokugikan. Advance tickets go on sale on August 7, 2027.
Is September typhoon season in Tokyo?
Yes. Around Tokyo, typhoons come close most often in September.
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Sources
Event dates come from the official pages below; weather from the Japan Meteorological Agency (1991–2020 averages; weather and sumo dates checked November 5, 2026); the rest from our guides, which list their official sources (checked October 23, 2026). Dates change every year, so please check before you go.
