The weather in Kawaguchi in September is hot. The average temperatures are between 21°C and 28°C.
You can expect rain for roughly half of the month of September in Kawaguchi. 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 Kawaguchi in September 2025.
If you’re planning to visit Kawaguchi in the near future, we highly recommend that you review the 14 day weather forecast for Kawaguchi before you arrive.
Temperatures
28° / 21°
Rainy Days
9
Snowy Days
0
Dry Days
21
Rainfall
198
mm
Sun Hours
5.2
Hrs
