Otaru Weather in September

In Otaru, September brings pleasant daytime temperatures around 21°C (70°F), with nights cooling to 15°C (59°F). Expect quite a bit of rainfall this month.

Rainfall in Otaru in September

Records from the past 30 years suggest around 18 days of rain, with 166 mm (6.5 in) average for the month. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.

Temperature in Otaru in September

Otaru in September gets highs of 21°C (70°F) during the day and drops to 15°C (59°F) at night. The month of September belongs to the summer season. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights drop to around 15°C (59°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Otaru in September

With about 161 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Otaru.

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Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Japan, check out our Otaru's climate page.

Otaru Temperature in September

Min Temperature 15°C (59°F)  

Max Temperature 21°C (70°F)  

Chance of Rain 60%  

Precipitation 166 mm (6.5 in)  

Rainy days 18 days  

Humidity 71% *  

Sunshine 161 hours *  

Percentage Sunshine *  

* Data from: Sapporo, Japan (28 KM, 17 Miles).

What to Wear in Otaru in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Otaru in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Camping

6/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Japan, check out our Otaru's climate page.

More climate data for Otaru

Temperature Rainfall Sunshine Humidity

See the full Otaru climate overview or explore weather in Japan.