Click on a day for an hourly weather forecast
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.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 9° / 1° | 4 | 27 | 0 | 56 mm | Ok | Kawaguchi in January |
| February | 10° / 2° | 5 | 22 | 1 | 76 mm | Ok | Kawaguchi in February |
| March | 14° / 6° | 7 | 24 | 0 | 115 mm | Ok | Kawaguchi in March |
| April | 19° / 10° | 7 | 23 | 0 | 129 mm | Ok | Kawaguchi in April |
| May | 24° / 16° | 8 | 23 | 0 | 133 mm | Good | Kawaguchi in May |
| June | 26° / 19° | 9 | 21 | 0 | 185 mm | Good | Kawaguchi in June |
| July | 30° / 24° | 11 | 20 | 0 | 179 mm | Ok | Kawaguchi in July |
| August | 32° / 25° | 8 | 23 | 0 | 135 mm | Ok | Kawaguchi in August |
| September | 28° / 21° | 9 | 21 | 0 | 198 mm | Good | Kawaguchi in September |
| October | 22° / 15° | 9 | 22 | 0 | 232 mm | Ok | Kawaguchi in October |
| November | 17° / 10° | 6 | 24 | 0 | 105 mm | Good | Kawaguchi in November |
| December | 11° / 4° | 5 | 26 | 0 | 72 mm | Ok | Kawaguchi in December |