The temperatures in Otaru in September are comfortable with low of 12°C and and high up to 21°C.
You can expect about 3 to 8 days of rain in Otaru during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Otaru in September 2025.
If you’re planning to visit Otaru in the near future, we highly recommend that you review the 14 day weather forecast for Otaru before you arrive.
Temperatures
21° / 12°
Rainy Days
7
Snowy Days
0
Dry Days
23
Rainfall
202
mm
Sun Hours
6.0
Hrs
