Travel Weather Fairy🇯🇵 Japan · Kumamoto
Kumamoto Weather in September
Late summer · typhoon watchSeptember in Kumamoto has a JMA 1991–2020 normal high of 30.1°C and low of 21.2°C, with 172.6 mm of monthly precipitation. Conditions around Aso can feel cooler and change faster than in central Kumamoto.
Avg high86.2°F 30.1°CAvg low70.2°F 21.2°CRainy-day normal~9.3 daysMonthly rain172.6 mm
🧳 Packing guide
What to wear in Kumamoto in September
Pack for the city temperature range, but bring an extra layer for Aso where elevation, wind and visibility can make conditions feel different from central Kumamoto.
Travel takeaway: Check the latest forecast, road information and volcano-area access notices before an Aso day trip.
🗓️ Travel timing at a glance
Kumamoto: 12-month travel weather
Kumamoto has cool winters and hot, humid summers. JMA normals show a major rainfall peak in June and July, while late summer can also bring typhoon-related disruption.
JanWinterFebWinterMarEarly springAprSpringMayLate springJunRainy seasonJulSummer · very wetAugMidsummerSepLate summer · typhoon watchOctAutumnNovLate autumnDecWinter
Monthly labels summarize typical climate patterns for trip planning. Always check the latest forecast and tropical-storm alerts before departure.
✈️ Traveling soon?
Current Kumamoto weather and 7-day forecast
When departure is close, the latest forecast matters more than long-term averages.
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Forecast data: MET Norway · CC BY 4.0 · cached by Travel Weather Fairy
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Kumamoto weather in other months
Switch months to compare the seasonal pattern.