Japan Tokyo Weather in September — Climate Guide
September in Tokyo is Mixed
September is Mixed for Tokyo.
September is Tokyo's transition from summer to autumn. Early month still hits 30°C, but late September drops to around 25°C and becomes pleasant. The catch: rain. September is Tokyo's wettest month, with 225mm of rainfall, and typhoons often pass through Japan during this period — check forecasts daily.
If you can accept typhoon risk, September isn't a bad choice. Summer peak season ends, prices drop, and aside from mid-September Silver Week (Respect for the Aged Day + Autumn Equinox holidays), attractions are relatively quiet. Tokyo Game Show makes this a great month for gaming fans — general admission $15 / ¥2,300 with required online booking.
Travel score
Tokyo September Weather Stats
Avg High
27.5°C
Avg Low
19.7°C
Rainy Days
12.3
224.9mm total
Sunshine
4.4h
Daily avg
Humidity
73%
Sticky and humid
UV Index
6
High
Wind
8 km/h
Gusts 18
Sea Temp
25°C
Avg water temp
Crowds
Busy
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
12 μg/m³
PM10
20 μg/m³
Status
Good
Feels-Like Temperature & Wind
Feels like
Daytime
30°C
Nighttime
20°C
Humidity and wind affect how the actual temperature feels.
Wind
8 km/h
Max gust 18 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Post-summer pricing drops on flights and hotels
- Tokyo Game Show and other major events
- Late month brings cooler, comfortable autumn weather
Cons
- Highest rainfall of the year (225mm)
- Typhoon season — flight cancellations and itinerary changes possible
September Events & Festivals
- Tokyo Game Show (東京ゲームショウ, mid-to-late September, Makuhari Messe)
- Tsukimi (月見, autumn moon viewing) — traditional moon-viewing rituals
- Meguro Sanma Festival (目黒のさんま祭り, early September) — free grilled mackerel pike
- Shimokitazawa Theater Festival (September)
Tokyo in September — Full Picture
September is Tokyo's transition from summer to autumn. Early month still hits 30°C, but late September drops to around 25°C and becomes pleasant. The catch: rain. September is Tokyo's wettest month, with 225mm of rainfall, and typhoons often pass through Japan during this period — check forecasts daily.
If you can accept typhoon risk, September isn't a bad choice. Summer peak season ends, prices drop, and aside from mid-September Silver Week (Respect for the Aged Day + Autumn Equinox holidays), attractions are relatively quiet. Tokyo Game Show makes this a great month for gaming fans — general admission $15 / ¥2,300 with required online booking.
Early September's Meguro Sanma Festival distributes free grilled mackerel pike — tens of thousands queue annually for an unusual taste of Japanese autumn. Late September brings autumn-only menu items: convenience stores and cafés stock sweet potato (satsumaimo), chestnut (kuri), and fig (ichijiku) desserts. Travel insurance is strongly recommended given typhoon season.
What to Wear & What to Pack
Early September is still summer — pack T-shirts, but add thin long-sleeves and a cardigan for late month. Rain probability is high — waterproof jacket or umbrella essential. Typhoon season means a windbreaker doubles as protection.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
19.1°C
9.3°C
10.6/mo
Summer (Jun·Jul·Aug)
29.1°C
21°C
10.9/mo
Autumn (Sep·Oct·Nov)
Current22.1°C
14°C
10.6/mo
Winter (Dec·Jan·Feb)
10.9°C
1.8°C
5.2/mo
Tokyo Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 9.8° | 0.6° | 5.3d·59.7mm | 6.2h | 51% | 2 | Quiet | Low season | |
| 10.9° | 1.7° | 5.6d·56.5mm | 6.1h | 52% | 3 | Quiet | Low season | |
| March (Best) | 14.2° | 4.4° | 10.1d·116mm | 5.7h | 57% | 5 | Very busy | Peak |
| April (Best) | 19.4° | 9.4° | 10.8d·133.7mm | 5.9h | 62% | 6 | Very busy | Peak |
| May (Best) | 23.6° | 14° | 10.9d·139.7mm | 6h | 65% | 7 | Busy | Shoulder |
| 26.1° | 18° | 12d·167.8mm | 4.5h | 75% | 8 | Moderate | Low season | |
| 29.9° | 22° | 11.4d·156.2mm | 5.1h | 76% | 9 | Moderate | Shoulder | |
| 31.3° | 23° | 9.4d·154.7mm | 6h | 73% | 9 | Moderate | Shoulder | |
| 27.5° | 19.7° | 12.3d·224.9mm | 4.4h | 73% | 6 | Busy | Shoulder | |
| October (Best) | 22° | 14.2° | 11.8d·234.8mm | 4.6h | 69% | 4 | Busy | Shoulder |
| 16.7° | 8.1° | 7.6d·96.3mm | 5.3h | 63% | 3 | Moderate | Shoulder | |
| 12° | 3.1° | 4.8d·57.9mm | 5.8h | 55% | 2 | Busy | Peak |
View Other Months
Tokyo September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Tokyo?
Tokyo in September is Mixed. Tourist crowds are busy and flight/hotel prices are shoulder.
What's the average temperature in Tokyo in September?
Tokyo September averages a high of 27.5°C and a low of 19.7°C.
Does it rain much in Tokyo in September?
Tokyo September averages 224.9mm of rainfall over about 12.3 rainy days.
What should I wear in Tokyo in September?
Early September is still summer — pack T-shirts, but add thin long-sleeves and a cardigan for late month. Rain probability is high — waterproof jacket or umbrella essential. Typhoon season means a windbreaker doubles as protection.
What time are sunrise and sunset in Tokyo in September?
Tokyo September sunrise is 05:22 and sunset is 17:46, with 12h 24m of daylight.
What's the air quality like in Tokyo in September?
Tokyo September air quality (AQI) averages 30, rated Good. PM2.5 averages 12μg/m³.
What activities are recommended in Tokyo in September?
In September, Tokyo is great for Tsukimi (moon viewing), Autumn food touring, Walking tours begin.
Is September peak season in Tokyo?
Tokyo September crowds are busy and prices are shoulder. Advance reservations are strongly recommended.
Best Months to Visit Tokyo
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.