Hakone weather in September
Temperature, rain and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Fair
Best time to visit: May, October
What is the weather like in Hakone in September?
In September, Hakone is warm: daytime highs average 23 °C, and nights cool down to about 17 °C. Expect around 4 hours of sunshine a day. It rains often – on about 17 days, adding up to 237 mm. All in all, September is a so-so month for a holiday in Hakone.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 57 | 55 | 60 |
| Day | 26° | 23° | 18° |
| Night | 20° | 17° | 11° |
| Sun | 5 h | 4 h | 4 h |
| Rain days | 19 | 17 | 15 |
More details for September
- Daylight
- 12 h 27 min05:26 – 17:53
- UV index
- 8 · very highclear sky, noon (estimate)All months
- Muggy days
- 14 daysdew point 18 °C or moreAll months
- Wind
- 9 km/haverage daily peakAll months
- Cloud cover
- 74 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC+9Asia/Tokyo
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %17 %
- Few rainy daysweight 30 %6 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in September
- Sunscreen
- Sunglasses & sun hat
- Rain jacket or umbrella
Hakone in September: quick answers
Is Hakone hot in September?
Warm rather than hot: in September, daytime highs in Hakone average 23 °C and nights cool to about 17 °C.
Does it rain much in Hakone in September?
It rains often – on about 17 days, adding up to 237 mm.
Hakone month by month
The whole year in HakoneAll destinations: JapanWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences