The temperatures in Otaru in August are comfortable with low of 16°C and and high up to 24°C.
You can expect rain for roughly half of the month of August in Otaru. 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 Otaru in August 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
24° / 16°
Rainy Days
11
Snowy Days
0
Dry Days
20
Rainfall
253
mm
Sun Hours
5.3
Hrs
