Tokyo, Japan weather in September

Averages from 2021–2025 (150 days of record).

Average high: 84°F
Average low: 71°F
Rainy days: ~14 per month
Total precipitation: 7.9 in
Warmest recorded: 98°F
Coldest recorded: 58°F

Expect September days in Tokyo, Japan to top out around 84°F and cool to about 71°F overnight, with roughly 14 days of measurable rain across the month. In recent years September has ranged from 58°F to 98°F.

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Current Tokyo, Japan forecast → · Historical data by Open-Meteo (ERA5).