The temperatures in Hakone in September are comfortable with low of 18°C and and high up to 24°C.
You can expect rain for roughly half of the month of September in Hakone. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Hakone in September 2025.
If you’re planning to visit Hakone in the near future, we highly recommend that you review the 14 day weather forecast for Hakone before you arrive.
Temperatures
24° / 18°
Rainy Days
9
Snowy Days
0
Dry Days
21
Rainfall
322
mm
Sun Hours
5.8
Hrs
