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Weather in Otaru-shi for September 2025

Your guide to Otaru-shi weather in September - trends and predictions
  • In general, the average temperature in Otaru-shi at the beginning of September is 23.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.1 °C by the end of September.

  • Expect significant rainfall in Otaru-shi during September, with an average of 18 rainy days.

  • Is September a good time to visit Otaru-shi? check out the best time to travel to Otaru-shi page.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
12
Dry days
Average rainy days
18
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/15°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
78 %
Avg humidity

Otaru-shi in September average weather

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Temperatures trend during September in Otaru-shi

See the weather trend as well as the moving average line
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September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
24° /15° 0 mm 6
2 Sept. Patchy rain possible
Patchy rain possible
23° /15° 1 mm 5
3 Sept. Sunny
Sunny
24° /16° 0.1 mm 6
4 Sept. Light rain shower
Light rain shower
25° /15° 1.4 mm 6
5 Sept. Light rain shower
Light rain shower
25° /16° 2.8 mm 6
6 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
22° /17° 11.8 mm 5
7 Sept. Patchy rain possible
Patchy rain possible
22° /13° 1.2 mm 6
8 Sept. Sunny
Sunny
24° /13° 0 mm 7
9 Sept. Cloudy
Cloudy
24° /15° 0 mm 6
10 Sept. Light rain shower
Light rain shower
25° /16° 1.1 mm 6
11 Sept. Cloudy
Cloudy
24° /16° 3.8 mm 6
12 Sept. Moderate rain
Moderate rain
23° /15° 3.6 mm 5
13 Sept. Mist
Mist
24° /13° 1 mm 5
14 Sept. Moderate rain
Moderate rain
20° /13° 15 mm 5
15 Sept. Sunny
Sunny
20° /13° 10.6 mm 5
16 Sept. Overcast
Overcast
22° /12° 0 mm 5
17 Sept. Overcast
Overcast
22° /14° 0.9 mm 5
18 Sept. Light drizzle
Light drizzle
23° /15° 1.7 mm 6
19 Sept. Patchy rain possible
Patchy rain possible
22° /14° 0.3 mm 5
20 Sept. Patchy rain possible
Patchy rain possible
18° /12° 2.2 mm 4
21 Sept. Patchy rain possible
Patchy rain possible
16° /10° 0.5 mm 4
22 Sept. Sunny
Sunny
18° /9° 0.3 mm 5
23 Sept. Light rain shower
Light rain shower
18° /10° 0.6 mm 4
24 Sept. Cloudy
Cloudy
19° /9° 0 mm 5
25 Sept. Patchy rain possible
Patchy rain possible
20° /10° 0.1 mm 5
26 Sept. Moderate rain at times
Moderate rain at times
21° /12° 1.8 mm 5
27 Sept. Partly cloudy
Partly cloudy
21° /12° 0.8 mm 6
28 Sept. Light rain shower
Light rain shower
19° /13° 25.8 mm 4
29 Sept. Patchy rain possible
Patchy rain possible
20° /11° 1 mm 5
30 Sept. Cloudy
Cloudy
21° /11° 0 mm 6
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Important Notice
Our weather forecast for Otaru-shi in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Otaru-shi forecast closer to your planned date for the most up-to-date weather information.

Otaru-shi in September - FAQ

What are the expected maximum and minimum temperatures in Otaru-shi during September?
During September, expect a variety of temperatures with highs around 22° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Otaru-shi during September?
Significant rainfall exceeding 107 mm is expected in Otaru-shi during September, occurring over more than 18 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Otaru-shi during September?
The average wind speed in Otaru-shi during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Otaru-shi in September?

As you prepare for your trip to Otaru-shi in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Otaru-shi, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Layered Clothing: Light sweaters, long-sleeve shirts, light jackets, and comfortable pants
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Umbrellas/Raincoats: For rainy days

September rainfall patterns in Otaru-shi

Explore the daily rainfall trends and prepare for Otaru-shis September weather 💧

UV exposure in Otaru-shi during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Otaru-shi?

Get accurate weather forecasts for Otaru-shi, located at latitude 43.189 and longitude 141.002. Stay updated with localized weather information tailored for Otaru-shi.

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