The temperatures in Nikko in September are comfortable with low of 15°C and and high up to 24°C.
You can expect rain for roughly half of the month of September in Nikko. 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 Nikko in September 2025.
If you’re planning to visit Nikko in the near future, we highly recommend that you review the 14 day weather forecast for Nikko before you arrive.
Temperatures
24° / 15°
Rainy Days
10
Snowy Days
0
Dry Days
20
Rainfall
301
mm
Sun Hours
5.5
Hrs
