Late August and early September in Japan are warm and humid, and it is typhoon season. Both sound more dramatic than they are for the tour: with light clothing, a folding umbrella and a glance at the weather app, you are well prepared. Weather-wise, the 2018 tour went entirely smoothly.
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Temperatures 気温
In early September the highs are around 28 °C and drop towards 24 °C as the month goes on. So the days are pleasantly summery, the evenings noticeably fresher at 18–22 °C.
Humidity is high at around 70–80 % – it feels muggy, but is quite bearable, especially since interiors, trains and buses are air-conditioned almost everywhere.
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What to wear 服装
Light summer clothing is enough for the day: T-shirts, light trousers, comfortable shoes for all the walking. Add a thin jacket or a cardigan for the cooler evenings and the often strongly air-conditioned interiors.
The choir dress code applies for the concerts – so don't forget the formal wardrobe.
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Rain & umbrella 雨
Across September there are about twelve to thirteen rainy days spread over the month – not daily, and rarely all day long. A folding umbrella in your day pack is usually enough.
And if you are ever caught without one: cheap umbrellas are sold in every konbini (24-hour shop) on the corner.
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Typhoon season – keep it in perspective 台風
September is statistically the most active typhoon month. But the region matters: the Kanto region around Tokyo is hit directly far less often than southern Japan. In about half of all Septembers there are no direct effects on Tokyo at all, and many systems turn off to the north-east beforehand.
In short: a direct hit during the tour is statistically rather unlikely. Being prepared is worthwhile, but the season is no reason to worry.
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Practical tips 備え
A small routine helps keep the weather relaxed:
- A weather app on your phone: the official JMA (Japan Meteorological Agency) and Yahoo! Weather Japan are reliable – both warn early and precisely.
- A light folding umbrella always with you.
- A waterproof bag or sleeve for the sheet music – the essentials stay dry.
- Light clothing plus a thin jacket for evenings and air-conditioned rooms.
In rain or muggy heat there are good indoor alternatives everywhere: museums, covered shopping streets and temple halls. The free days can be rearranged flexibly that way – ideas on the leisure page.
As of 2026 · Weather and typhoon data based on the Japan Meteorological Agency (JMA). Check current forecasts shortly before and during the trip.