Otaru weather in September
Monthly temperatures, rain, humidity, what to wear and what to pack — 2024–2025 historical average
Otaru September weather at a glance
In September, Otaru averages 19.5°C, with typical highs of 22.9°C and lows of 16.1°C. The historical average is 11 wet days and 74% humidity.
Otaru September temperature & humidity
Otaru September rain & wet days
Pack a compact umbrella. Keep an indoor stop available between outdoor activities.
What to wear in Otaru in September
T-shirts or long sleeves with one light outer layer should be comfortable. Showers are possible, so a compact umbrella is useful.
- DaytimeLong sleeves and a light jacket · average high 22.9°C
- Morning & eveningLong sleeves with a jacket or cardigan · average low 16.1°C
- FootwearComfortable walking shoes; quick-dry footwear for rainy days.
Packing essentials
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Otaru September sunrise & sunset times
2026 September · Local time (Asia/Tokyo)
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 2026-09-01 | 05:00 | 18:12 | 13h 12m |
| 2026-09-15 | 05:15 | 17:47 | 12h 32m |
| 2026-09-30 | 05:32 | 17:20 | 11h 48m |
For sunset photos, arrive before the listed sunset time. Clouds, mountains and buildings can change when the sun becomes visible or disappears.
Calculated for the city coordinates with daylight saving applied. SunCalc · tz-lookup
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Best months to visit Otaru
Bar height shows our simple weather-comfort score, not a safety rating; colour shows temperature.
September weather by year
Daily weather in 2025
Daily high and low temperatures; blue labels show precipitation
Frequently asked questions
What is Otaru weather like in September?
In September, Otaru averages 19.5°C, with typical highs of 22.9°C and lows of 16.1°C. The historical average is 11 wet days and 74% humidity. Our weather-comfort rating for this month is good.
Does it rain a lot in Otaru in September?
There are about 11 wet days in September. A compact umbrella is still useful.
What should I wear in Otaru in September?
T-shirts or long sleeves with one light outer layer should be comfortable. Showers are possible, so a compact umbrella is useful.
What are the best months to visit Otaru?
Recent weather data rates June, September among the more comfortable months.
Where can I check Otaru weather in September in real time?
Check local webcams for the view right now and a local weather service for today’s forecast. Monthly temperatures here are historical averages.
What time are sunrise and sunset in Otaru in September?
On 2026-09-15, calculated sunrise is 05:15 and sunset is 17:47 in local time (Asia/Tokyo). Times vary by date and terrain.
Otaru weather by month
More Japan destinations in September
Open-Meteo (CC BY 4.0) · 2024–2025 historical data, aggregated and rounded by this site. Not a forecast or long-term climate normal. Calculation method and limitations