Tokyo in September: weather, what to wear and events

Tokyo weather in September

Averages for 1991–2020 at the JMA's Tokyo station (25 m above sea level).

High: 27.5°C (82°F)
Low: 20.3°C (69°F)
Precipitation: 224.9 mm
Wet days: 11.0 days
Sunshine: 127 hours

Highs fall 3.8°C from August and drop another 5.5°C into October.

That is 7.2°C above Tokyo's yearly average high of 20.3°C.

Of our 14 places with temperature records, Tokyo is the 7th coldest in September: 1.1°C cooler than Fukuoka and 0.3°C warmer than Kanazawa.

September is Tokyo's 2nd wettest month (224.9 mm).

Of our 15 places, Tokyo has the 8th highest precipitation in September: 1.0 mm less than Takayama and 10.4 mm more than Shirakawa-go.

Rain of 1 mm or more falls on 11.0 days, and 10 mm or more on 5.6 days.

Rain of 30 mm or more in one day falls on 2.1 days, and 50 mm or more on 1.1 days.

8.2 days reach 30°C or more.

On 1.7 nights the low stays at 25°C or above.

The sun is out for 40% or more of the possible hours on 12.4 days, and 6.1 days have under 0.1 hours of sunshine.

By the JMA's cloud records, 0.7 days are clear and 15.6 are overcast.

On 15 September 2027 the sun rises at 5:23 and sets at 17:49 in Tokyo, giving 12 hours 26 minutes of daylight (NAOJ).

Average temperature: 23.3°C (74°F)
Humidity: 75%
Days of 25°C or more: 22.4 days

Early, mid and late September

Tokyo in September by ten-day period: averages for 1991–2020 (JMA)
Days	High	Low	Precipitation
1–10 September	29.6°C	22.3°C	75.6 mm
11–20 September	27.8°C	20.5°C	75.1 mm
21–30 September	25.1°C	18.0°C	74.2 mm

By the last ten days of September the average high in Tokyo is 4.5°C lower than in the first ten.

What to wear in Tokyo in September

Warm: highs around 27.5°C

Short sleeves or thin long sleeves, with a light layer for air-conditioning and evenings.
Humidity averages 75%: quick-dry fabrics are more comfortable.
An umbrella: rain falls on 11.0 days.

Pack

Umbrella
Quick-dry clothes
A light layer for air-conditioning

Our clothing rules

Rainy season and typhoons

In an average September, 1.2 typhoons come within 300 km of the Kanto-Koshin region; across Japan, 3.3 come within 300 km and 1.0 make landfall (JMA, 1991–2020).

September records in Tokyo

The extremes the JMA has measured in September at its Tokyo station.

Hottest September day: 38.1°C (101°F) on 3 September 1984 (records since 1875)
Coldest September night: 10.5°C (51°F) on 28 September 1906 (records since 1875)
Wettest September day: 371.9 mm on 26 September 1958 (records since 1875)

Holidays and crowds in September

National holidays in September 2027:

Mon 20 September — Respect for the Aged Day
Thu 23 September — Autumnal Equinox Day

Sat 18 September to Mon 20 September: 3 days off in a row

In September 2025, hotels and inns across Tokyo were 76.5% full on average (6th busiest of 12 months). Foreign guests spent 4.51 million nights there that month (Japan Tourism Agency). That compares with 74.5% in August and 80.6% in October.

What's on in Tokyo in September

Events in Tokyo in September: dates from each organizer's official page
Event	When	Where and what
Grand Sumo September Tournament (Tokyo Basho)大相撲九月場所（東京）	Mid-September, Sunday to Sunday: 13 to 27 September in 2026 and 12 to 26 September in 2027	Kokugikan (Ryogoku Kokugikan), Tokyo. Professional sumo tournament run by the Japan Sumo Association. The association's annual schedule lists the first day (Sunday 13 September in 2026) and the final day (Sunday 27 September). According to the schedule, advance ticket sales start on 8 August in 2026 and on 7 August in 2027. Official page
Reitaisai (Annual Grand Festival) at Nezu Shrine根津神社例大祭	Late September: festival events on 26 and 27 September in 2026, with the rite itself on 21 September	Nezu Shrine, Tokyo; stalls are set up in the grounds on the festival days. Offered performances in 2026 included Urayasu-no-mai (26 September, 19:00) and Sanza-mai (27 September, 14:00). The portable-shrine procession (miya-mikoshi togyo) took place on 27 September from 9:00 to 16:00. The portable-shrine procession is held once every four years, and 2026 was a procession year. Vehicle traffic is difficult at set times on 27 September on the shrine's front approach, Nichii-dai Tsutsuji Street and Yomise-dori shopping street. Official page

Tokyo before and after September

Tokyo: August, September and October (JMA, 1991–2020)
Month	High	Low	Precipitation	Wet days
August	31.3°C (+3.8°C)	23.5°C (+3.2°C)	154.7 mm (−70.2 mm)	7.9 days (−3.1 days)
September	27.5°C	20.3°C	224.9 mm	11.0 days
October	22.0°C (−5.5°C)	14.8°C (−5.5°C)	234.8 mm (+9.9 mm)	10.5 days (−0.5 days)

Other places in September

September: Tokyo against five other places (JMA, 1991–2020)
Place	High	Against Tokyo	Wet days	Against Tokyo
Kyoto	29.2°C	+1.7°C	9.8 days	−1.2 days
Osaka	29.5°C	+2.0°C	9.5 days	−1.5 days
Sapporo	22.8°C	−4.7°C	10.2 days	−0.8 days
OkinawaNaha	30.6°C	+3.1°C	11.8 days	+0.8 days
Fukuoka	28.6°C	+1.1°C	9.7 days	−1.3 days

All 15 places in September

Frequently asked questions

What is the weather like in Tokyo in September?

The average high is 27.5°C (82°F) and the average low 20.3°C (69°F). 224.9 mm of rain falls on about 11.0 days (JMA, 1991–2020).

What should I wear in Tokyo in September?

Short sleeves or thin long sleeves, with a light layer for air-conditioning and evenings. Humidity averages 75%: quick-dry fabrics are more comfortable. An umbrella: rain falls on 11.0 days.

Is Tokyo busy in September?

In September 2025, hotels and inns across Tokyo were 76.5% full on average (6th busiest of 12 months). Foreign guests spent 4.51 million nights there that month (Japan Tourism Agency).

What are the record temperatures for September in Tokyo?

The highest temperature the JMA has recorded in Tokyo in September is 38.1°C (101°F), on 3 September 1984. The lowest is 10.5°C (51°F), on 28 September 1906.

What events are on in Tokyo in September?

Grand Sumo September Tournament (Tokyo Basho): Mid-September, Sunday to Sunday: 13 to 27 September in 2026 and 12 to 26 September in 2027. Reitaisai (Annual Grand Festival) at Nezu Shrine: Late September: festival events on 26 and 27 September in 2026, with the rite itself on 21 September.

Related items

Sources for this page

Japan Meteorological Agency (JMA) Normals for 1991–2020: Tokyo (東京), month by month (平年値年・月ごとの値)checked October 2, 2026
Japan Meteorological Agency (JMA) Normals for 1991–2020: Tokyo (東京), rain days, temperature days and snow (詳細)checked October 2, 2026
Japan Meteorological Agency (JMA) Ten-day normals for 1991–2020: Tokyo (東京) (平年値旬ごとの値)checked October 2, 2026
Japan Meteorological Agency (JMA) Records for September: Tokyo (東京) (観測史上1〜10位の値)checked October 2, 2026
National Astronomical Observatory of Japan (NAOJ) Sunrise and sunset by prefectural capital (各地のこよみ)checked October 2, 2026
Japan Meteorological Agency (JMA) Typhoon averages, 1991–2020 (台風の平年値)checked October 2, 2026
Cabinet Office National holidays (国民の祝日について)checked October 2, 2026
Japan Tourism Agency Overnight Travel Statistics Survey, 2025 final figures (宿泊旅行統計調査 2025年年の確定値)checked October 2, 2026
Japan Sumo Association Grand Sumo September Tournament (Tokyo Basho) (大相撲九月場所（東京）)checked October 2, 2026
Nezu Shrine Reitaisai (Annual Grand Festival) at Nezu Shrine (根津神社例大祭)checked October 2, 2026

Tokyo in September: weather, what to wear and what's on