Yamaguchi (Iwakuni)
September
Weather in Yamaguchi for September 2027
Your guide to Yamaguchi weather in September - trends and predictions
In general, the average temperature in Yamaguchi at the beginning of September is 28 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24.5 °C by the end of September.
The climate of Yamaguchi in September is notably wet, with an average of 15 rainy days, and a total of 158.5 mm of precipitation.
Is September a good time to visit Yamaguchi? check out the best time to travel to Yamaguchi page.
✨ Is September a good time to visit Yamaguchi? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
15
Dry days
15
Rainy days
0
Snow days
27°/22°
Temperatures
12 km/h
Avg max wind
81 %
Avg humidity
Yamaguchi Weather September
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Temperatures trend during September in Yamaguchi
See the weather trend as well as the moving average line
September weather in Yamaguchi day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 29° /24° | 0.7 mm | 8 | |
| 2 Sept. |  Light rain | 29° /23° | 3.4 mm | 5 | |
| 3 Sept. | Light rain | 28° /22° | 7.6 mm | 5 | |
| 4 Sept. |  Heavy rain | 25° /22° | 26.1 mm | 4 | |
| 5 Sept. |  Sunny | 28° /22° | 0.9 mm | 5 | |
| 6 Sept. | Patchy rain possible | 28° /22° | 0.6 mm | 4 | |
| 7 Sept. | Patchy rain possible | 29° /23° | 0.4 mm | 5 | |
| 8 Sept. | Patchy rain possible | 29° /23° | 1 mm | 5 | |
| 9 Sept. | Sunny | 28° /23° | 0.7 mm | 6 | |
| 10 Sept. |  Moderate rain | 26° /21° | 17.5 mm | 5 | |
| 11 Sept. | Light rain | 28° /23° | 4 mm | 5 | |
| 12 Sept. | Patchy rain possible | 28° /23° | 2 mm | 5 | |
| 13 Sept. | Light rain | 28° /24° | 3.5 mm | 5 | |
| 14 Sept. | Light rain | 29° /23° | 9.4 mm | 5 | |
| 15 Sept. | Light rain | 27° /23° | 7.2 mm | 5 | |
| 16 Sept. | Patchy rain possible | 28° /23° | 1.9 mm | 5 | |
| 17 Sept. | Light rain shower | 28° /22° | 2.3 mm | 5 | |
| 18 Sept. | Light rain | 26° /23° | 8.5 mm | 4 | |
| 19 Sept. |  Partly cloudy | 27° /22° | 0.1 mm | 6 | |
| 20 Sept. | Light rain | 28° /23° | 2.7 mm | 6 | |
| 21 Sept. | Light rain | 27° /21° | 2.5 mm | 6 | |
| 22 Sept. | Light rain | 26° /19° | 7 mm | 6 | |
| 23 Sept. | Patchy rain possible | 24° /19° | 1.1 mm | 6 | |
| 24 Sept. |  Cloudy | 25° /19° | 0.9 mm | 5 | |
| 25 Sept. | Patchy rain possible | 25° /21° | 2.1 mm | 4 | |
| 26 Sept. | Moderate rain | 25° /20° | 11.2 mm | 4 | |
| 27 Sept. | Light rain | 24° /20° | 8.4 mm | 4 | |
| 28 Sept. | Moderate rain | 25° /20° | 19 mm | 4 | |
| 29 Sept. | Light rain | 24° /19° | 4.9 mm | 5 | |
| 30 Sept. | Patchy rain possible | 24° /18° | 0.7 mm | 6 | |
| Next | |||||
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.
Change Month
Yamaguchi weather in September vs August vs October
Compare September weather in Yamaguchi 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 | 30°/24° | 27°/22° | 22°/16° |
| Rainfall | 156 mm | 158 mm | 95 mm |
| Wind | 11 km/h | 12.2 km/h | 15.3 km/h |
| Humidity | 80% | 81% | 75% |
| Rainy days | 17 days | 15 days | 10 days |
| Dry days | 14 days | 15 days | 21 days |
Planning a trip to Yamaguchi? Discover the best time to visit
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 27° and lows near 22°, suitable for diverse activities and preferences.
How much rainfall should be expected in Yamaguchi during September?
Significant rainfall exceeding 158.5 mm is expected in Yamaguchi during September, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Yamaguchi during September?
The average wind speed in Yamaguchi during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Yamaguchi
Explore the daily rainfall trends and prepare for Yamaguchis September weather 💧
Typically, Yamaguchi has 15 rainy days in September with a total of 158.5 mm of rainfall.
UV exposure in Yamaguchi during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
What to pack to Yamaguchi in September?
Warm & sunny · highs around 27 °C, frequent showers
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.
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