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Weather in Iwakuni for September 2025

Your guide to Iwakuni weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Iwakuni has been nearly identical to the historical average, with a temperature of 28.7 °C (showing only a slight deviation of -0.4 °C).

  • Expect cooler weather in the next days in Iwakuni with the forecast suggesting a temperature of 26 °C, lower than the historical average.

  • In general, the average temperature in Iwakuni at the beginning of September is 29 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 25.3 °C by the end of September.

    • Rain 🌧️

  • Iwakuni experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 49.2 mm.

    • More

  • Is September a good time to visit Iwakuni? check out the best time to travel to Iwakuni page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
21
Dry days
Average rainy days
9
Rainy days
Average snowy days
0
Snow days
Average temperatures
28°/22°
Temperatures
Average wind speed
11 km/h
Avg max wind
Average humidity
80 %
Avg humidity

Iwakuni Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy rain possible
30°
2
Patchy rain possible
29°
3
Patchy rain possible
29°
4
Patchy rain possible
26°
5
Sunny
30°
6
Patchy rain possible
29°
7
Patchy rain possible
30°
8
Patchy rain possible
30°
9
Sunny
30°
10
Cloudy
28°
11
Sunny
29°
12
Patchy rain possible
29°
13
Patchy rain possible
29°
14
Patchy rain possible
30°
15
Moderate rain
29°
16
Patchy rain possible
30°
17
Patchy rain possible
30°
18
Moderate rain
29°
19
Moderate rain
25°
20
Patchy rain possible
22°
21
Moderate rain
22°
22
Patchy rain possible
26°
23
Patchy rain possible
25°
24
Moderate rain
26°
25
Moderate rain
24°
26
Patchy rain possible
27°
27
Patchy rain possible
25°
28
Patchy rain possible
24°
29
Patchy rain possible
26°
30
Patchy rain possible
25°

Temperatures trend during September in Iwakuni

See the weather trend as well as the moving average line

September weather in Iwakuni day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
 30° /24° 1.1 mm 7
2 Sept. Patchy rain possible
Patchy rain possible
 29° /23° 3.5 mm 7
3 Sept. Patchy rain possible
Patchy rain possible
 29° /23° 2 mm 7
4 Sept. Patchy rain possible
Patchy rain possible
 26° /22° 22.8 mm 6
5 Sept. Sunny
Sunny
 30° /23° 1.1 mm 7
6 Sept. Patchy rain possible
Patchy rain possible
 29° /22° 0.2 mm 6
7 Sept. Patchy rain possible
Patchy rain possible
 30° /22° 0.2 mm 7
8 Sept. Patchy rain possible
Patchy rain possible
 30° /23° 1.4 mm 7
9 Sept. Sunny
Sunny
 30° /23° 1 mm 7
10 Sept. Cloudy
Cloudy
 28° /22° 25.2 mm 7
11 Sept. Sunny
Sunny
 29° /23° 6 mm 7
12 Sept. Patchy rain possible
Patchy rain possible
 29° /23° 3 mm 7
13 Sept. Patchy rain possible
Patchy rain possible
 29° /24° 2.5 mm 6
14 Sept. Patchy rain possible
Patchy rain possible
 30° /23° 0 mm 7
15 Sept. Moderate rain
Moderate rain
 29° /24° 7.6 mm 1.9
16 Sept. Patchy rain possible
Patchy rain possible
 30° /24° 1.8 mm 2
17 Sept. Patchy rain possible
Patchy rain possible
 30° /24° 2.4 mm 2
18 Sept. Moderate rain
Moderate rain
 29° /23° 8.7 mm 1.7
19 Sept. Moderate rain
Moderate rain
 25° /22° 6.1 mm 5
20 Sept. Patchy rain possible
Patchy rain possible
 22° /19° 1.9 mm 5
21 Sept. Moderate rain
Moderate rain
 22° /19° 6.8 mm 5
22 Sept. Patchy rain possible
Patchy rain possible
 26° /20° 0.1 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
 25° /22° 0.3 mm 5
24 Sept. Moderate rain
Moderate rain
 26° /21° 8.2 mm 5
25 Sept. Moderate rain
Moderate rain
 24° /22° 9.2 mm 5
26 Sept. Patchy rain possible
Patchy rain possible
 27° /21° 3.5 mm 5
27 Sept. Patchy rain possible
Patchy rain possible
 25° /19° 0.5 mm 5
28 Sept. Patchy rain possible
Patchy rain possible
 24° /18° 0.2 mm 5
29 Sept. Patchy rain possible
Patchy rain possible
 26° /20° 0.5 mm 6
30 Sept. Patchy rain possible
Patchy rain possible
 25° /20° 2.1 mm 6
Next
Important Notice
Our weather forecast for Iwakuni 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 Iwakuni forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

Iwakuni weather in September vs August vs October

Compare September weather in Iwakuni with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AugustSeptemberOctober
WeatherPatchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Temperatures30°/24°28°/22°22°/16°
Rainfall163 mm49 mm86 mm
Wind10.7 km/h10.8 km/h15.6 km/h
Humidity79%80%76%
Rainy days16 days9 days12 days
Dry days15 days21 days19 days

Planning a trip to Iwakuni? Discover the best time to visit

Iwakuni in September - FAQ

What are the expected maximum and minimum temperatures in Iwakuni 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 Iwakuni during September?
In September, Iwakuni can expect light to moderate rainfall, totaling 49.2 mm across approximately 9 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Iwakuni during September?
The average wind speed in Iwakuni during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Iwakuni in September?

As you prepare for your trip to Iwakuni 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 Iwakuni, 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 Iwakuni

Explore the daily rainfall trends and prepare for Iwakunis September weather 💧

UV exposure in Iwakuni during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

Quick links

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Location coordinates Where is Iwakuni?

Get accurate weather forecasts for Iwakuni, located at latitude 34.163 and longitude 132.22. Stay updated with localized weather information tailored for Iwakuni.

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