Otaru-shi (Otaru)
September
Weather in Otaru-shi for September 2026
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 23.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.3 °C by the end of September.
Otaru-shi in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 89.5 mm.
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Temperatures
Rain 🌧️
More
13
Dry days
17
Rainy days
0
Snow days
21°/13°
Temperatures
14 km/h
Avg max wind
75 %
Avg humidity
Otaru-shi Weather September
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Temperatures trend during September in Otaru-shi
See the weather trend as well as the moving average line
September weather in Otaru-shi day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Partly cloudy | 25° /16° | 1.6 mm | 6 | |
| 2 Sept. |  Patchy rain possible | 23° /15° | 2.7 mm | 5 | |
| 3 Sept. |  Sunny | 24° /15° | 0.1 mm | 6 | |
| 4 Sept. | Sunny | 25° /15° | 0.9 mm | 6 | |
| 5 Sept. | Patchy rain possible | 25° /15° | 1.9 mm | 6 | |
| 6 Sept. |  Moderate or heavy rain shower | 23° /17° | 7.9 mm | 5 | |
| 7 Sept. | Patchy rain possible | 22° /14° | 2.6 mm | 5 | |
| 8 Sept. | Sunny | 25° /14° | 0 mm | 6 | |
| 9 Sept. |  Cloudy | 24° /15° | 0.1 mm | 5 | |
| 10 Sept. | Light rain shower | 25° /16° | 0.8 mm | 6 | |
| 11 Sept. | Cloudy | 24° /15° | 2.7 mm | 5 | |
| 12 Sept. |  Moderate rain | 23° /15° | 2.4 mm | 5 | |
| 13 Sept. |  Mist | 24° /13° | 2.7 mm | 5 | |
| 14 Sept. | Moderate rain | 20° /13° | 12.6 mm | 5 | |
| 15 Sept. | Sunny | 21° /13° | 7.1 mm | 5 | |
| 16 Sept. |  Overcast | 22° /13° | 0 mm | 5 | |
| 17 Sept. | Light rain shower | 22° /14° | 1 mm | 5 | |
| 18 Sept. |  Light drizzle | 22° /14° | 1.1 mm | 5 | |
| 19 Sept. | Patchy rain possible | 21° /13° | 0.2 mm | 5 | |
| 20 Sept. | Patchy rain possible | 19° /11° | 13.8 mm | 4 | |
| 21 Sept. | Patchy rain possible | 16° /9° | 9.5 mm | 4 | |
| 22 Sept. | Patchy rain possible | 19° /9° | 0.6 mm | 5 | |
| 23 Sept. | Light rain shower | 18° /10° | 0.4 mm | 4 | |
| 24 Sept. | Cloudy | 20° /9° | 0 mm | 5 | |
| 25 Sept. | Patchy rain possible | 19° /11° | 3.8 mm | 5 | |
| 26 Sept. | Moderate rain at times | 21° /12° | 1.5 mm | 5 | |
| 27 Sept. | Patchy rain possible | 21° /12° | 0.8 mm | 5 | |
| 28 Sept. | Light rain shower | 20° /13° | 17.2 mm | 4 | |
| 29 Sept. | Patchy rain possible | 20° /11° | 1.4 mm | 5 | |
| 30 Sept. | Cloudy | 21° /11° | 0 mm | 5 | |
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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.
Change Month
Otaru-shi weather in September vs August vs October
Compare September weather in Otaru-shi with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 25°/17° | 21°/13° | 14°/7° |
| Rainfall | 154 mm | 90 mm | 180 mm |
| Wind | 11.5 km/h | 14.5 km/h | 19.7 km/h |
| Humidity | 86% | 75% | 75% |
| Rainy days | 19 days | 17 days | 21 days |
| Dry days | 12 days | 13 days | 10 days |
Planning a trip to Otaru-shi? Discover the best time to visit
Otaru-shi in September - FAQ
What are the expected maximum and minimum temperatures in Otaru-shi during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Otaru-shi during September?
Moderate rainfall is anticipated in Otaru-shi during September, with a total of 89.5 mm spread over approximately 17 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Otaru-shi during September?
The average wind speed in Otaru-shi during September is 14 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
- Warm Clothing: Sweaters, hoodies, long 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
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Otaru-shi
Explore the daily rainfall trends and prepare for Otaru-shis September weather 💧
Typically, Otaru-shi has 17 rainy days in September with a total of 89.5 mm of rainfall.
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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