Otaru-shi (Otaru)
September
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.
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12
Dry days
18
Rainy days
0
Snow days
22°/15°
Temperatures
13 km/h
Avg max wind
78 %
Avg humidity
Otaru-shi in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  24° | 2  23° | 3  24° | 4 25° | 5 25° | 6  22° | 7 22° |
| 8 24° | 9  24° | 10 25° | 11 24° | 12  23° | 13  24° | 14 20° |
| 15 20° | 16  22° | 17 22° | 18  23° | 19 22° | 20 18° | 21 16° |
| 22 18° | 23 18° | 24 19° | 25 20° | 26 21° | 27 21° | 28 19° |
| 29 20° | 30 21° |
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Temperatures trend during September in Otaru-shi
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Partly cloudy | 24° /15° | 0 mm | 6 | |
| 2 Sept. | Patchy rain possible | 23° /15° | 1 mm | 5 | |
| 3 Sept. | Sunny | 24° /16° | 0.1 mm | 6 | |
| 4 Sept. | Light rain shower | 25° /15° | 1.4 mm | 6 | |
| 5 Sept. | Light rain shower | 25° /16° | 2.8 mm | 6 | |
| 6 Sept. | Moderate or heavy rain shower | 22° /17° | 11.8 mm | 5 | |
| 7 Sept. | Patchy rain possible | 22° /13° | 1.2 mm | 6 | |
| 8 Sept. | Sunny | 24° /13° | 0 mm | 7 | |
| 9 Sept. | Cloudy | 24° /15° | 0 mm | 6 | |
| 10 Sept. | Light rain shower | 25° /16° | 1.1 mm | 6 | |
| 11 Sept. | Cloudy | 24° /16° | 3.8 mm | 6 | |
| 12 Sept. | Moderate rain | 23° /15° | 3.6 mm | 5 | |
| 13 Sept. | Mist | 24° /13° | 1 mm | 5 | |
| 14 Sept. | Moderate rain | 20° /13° | 15 mm | 5 | |
| 15 Sept. | Sunny | 20° /13° | 10.6 mm | 5 | |
| 16 Sept. | Overcast | 22° /12° | 0 mm | 5 | |
| 17 Sept. | Overcast | 22° /14° | 0.9 mm | 5 | |
| 18 Sept. | Light drizzle | 23° /15° | 1.7 mm | 6 | |
| 19 Sept. | Patchy rain possible | 22° /14° | 0.3 mm | 5 | |
| 20 Sept. | Patchy rain possible | 18° /12° | 2.2 mm | 4 | |
| 21 Sept. | Patchy rain possible | 16° /10° | 0.5 mm | 4 | |
| 22 Sept. | Sunny | 18° /9° | 0.3 mm | 5 | |
| 23 Sept. | Light rain shower | 18° /10° | 0.6 mm | 4 | |
| 24 Sept. | Cloudy | 19° /9° | 0 mm | 5 | |
| 25 Sept. | Patchy rain possible | 20° /10° | 0.1 mm | 5 | |
| 26 Sept. | Moderate rain at times | 21° /12° | 1.8 mm | 5 | |
| 27 Sept. | Partly cloudy | 21° /12° | 0.8 mm | 6 | |
| 28 Sept. | Light rain shower | 19° /13° | 25.8 mm | 4 | |
| 29 Sept. | Patchy rain possible | 20° /11° | 1 mm | 5 | |
| 30 Sept. | 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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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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