Weather in Otaru for September 2025
In general, the average temperature in Otaru 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 during September, with an average of 18 rainy days.
Is September a good time to visit Otaru? check out the best time to travel to Otaru page.
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Otaru in September average weather
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° |
You can click on date
Temperatures trend during September in Otaru
September weather day by day
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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Otaru in September - FAQ
What to pack to Otaru in September?
As you prepare for your trip to Otaru 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, 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
Quick links
Get accurate weather forecasts for Otaru, located at latitude 43.189 and longitude 141.002. Stay updated with localized weather information tailored for Otaru.