Yamaguchi (Iwakuni)
September
Weather in Yamaguchi for September 2025
Your guide to Yamaguchi weather in September - trends and predictions
In general, the average temperature in Yamaguchi at the beginning of September is 28.3 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 25.7 °C by the end of September.
Yamaguchi sees moderate rainfall in September, averaging 9 rainy days.
Is September a good time to visit Yamaguchi? check out the best time to travel to Yamaguchi page.
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Temperatures
Rain 🌧️
More
21
Dry days
9
Rainy days
0
Snow days
28°/22°
Temperatures
11 km/h
Avg max wind
80 %
Avg humidity
Yamaguchi in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  29° | 2 28° | 3 28° | 4 27° | 5  29° | 6 28° | 7 29° |
| 8 29° | 9 29° | 10  30° | 11 30° | 12 30° | 13 29° | 14 30° |
| 15 28° | 16  29° | 17 29° | 18 29° | 19  30° | 20 29° | 21 28° |
| 22 26° | 23 26° | 24 25° | 25 25° | 26 26° | 27 27° | 28 26° |
| 29 26° | 30 25° |
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Temperatures trend during September in Yamaguchi
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. | Patchy rain possible | 29° /24° | 0.2 mm | 6 | |
| 2 Sept. | Patchy rain possible | 28° /22° | 0.6 mm | 6 | |
| 3 Sept. | Patchy rain possible | 28° /23° | 2.3 mm | 6 | |
| 4 Sept. | Patchy rain possible | 27° /21° | 0.1 mm | 6 | |
| 5 Sept. | Sunny | 29° /22° | 0 mm | 7 | |
| 6 Sept. | Patchy rain possible | 28° /22° | 0.4 mm | 6 | |
| 7 Sept. | Patchy rain possible | 29° /22° | 0.5 mm | 6 | |
| 8 Sept. | Patchy rain possible | 29° /23° | 0.3 mm | 6 | |
| 9 Sept. | Sunny | 29° /23° | 0 mm | 7 | |
| 10 Sept. | Cloudy | 30° /24° | 0 mm | 7 | |
| 11 Sept. | Sunny | 30° /24° | 0.1 mm | 8 | |
| 12 Sept. | Patchy rain possible | 30° /24° | 1.4 mm | 7 | |
| 13 Sept. | Patchy rain possible | 29° /24° | 2.4 mm | 6 | |
| 14 Sept. | Patchy rain possible | 30° /23° | 0 mm | 7 | |
| 15 Sept. | Light rain shower | 28° /25° | 2.3 mm | 6 | |
| 16 Sept. | Patchy light drizzle | 29° /25° | 4 mm | 6 | |
| 17 Sept. | Light rain shower | 29° /24° | 2.6 mm | 6 | |
| 18 Sept. | Patchy rain possible | 29° /24° | 0.8 mm | 6 | |
| 19 Sept. | Partly cloudy | 30° /24° | 0 mm | 8 | |
| 20 Sept. | Patchy rain possible | 29° /24° | 0.5 mm | 6 | |
| 21 Sept. | Patchy rain possible | 28° /25° | 5.5 mm | 6 | |
| 22 Sept. | Light rain shower | 26° /21° | 20.9 mm | 6 | |
| 23 Sept. | Patchy rain possible | 26° /19° | 0 mm | 6 | |
| 24 Sept. | Cloudy | 25° /18° | 0.6 mm | 6 | |
| 25 Sept. | Patchy rain possible | 25° /21° | 0.5 mm | 6 | |
| 26 Sept. | Patchy rain possible | 26° /20° | 0.1 mm | 6 | |
| 27 Sept. | Patchy rain possible | 27° /21° | 0.2 mm | 6 | |
| 28 Sept. | Patchy rain possible | 26° /22° | 0.4 mm | 6 | |
| 29 Sept. | Patchy rain possible | 26° /20° | 0.5 mm | 6 | |
| 30 Sept. | Patchy rain possible | 25° /20° | 2.1 mm | 6 | |
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Important Notice
Our weather forecast for Yamaguchi 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 Yamaguchi forecast closer to your planned date for the most up-to-date weather information.
Yamaguchi in September - FAQ
What are the expected maximum and minimum temperatures in Yamaguchi during September?
During September, expect a variety of temperatures with highs around 28° and lows near 22°, suitable for diverse activities and preferences.
How much rainfall should be expected in Yamaguchi during September?
In September, Yamaguchi can expect light to moderate rainfall, totaling 49.22 mm across approximately 9 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Yamaguchi during September?
The average wind speed in Yamaguchi during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Yamaguchi in September?
As you prepare for your trip to Yamaguchi 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 Yamaguchi, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- 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
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
September rainfall patterns in Yamaguchi
Explore the daily rainfall trends and prepare for Yamaguchis September weather 💧
UV exposure in Yamaguchi during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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