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Iwakuni

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Iwakuni Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Iwakuni year round climate

  • Spring (March–May): 11.3–19.4°C on average, mild and rainy, with occasional overcast days. Common activities: Hiking, flower viewing. Recommended clothing: Light jacket, comfortable long-sleeved clothing.
  • Summer (June–August): 23.3–30.0°C on average, hot and humid, with relatively high rainfall, particularly in July. Common activities: Beat the heat, viewing Weigela (if Iwakuni has related scenic spots). Recommended clothing: Light and breathable clothing, sun hat.
  • Autumn (September–November): 15.2–27.6°C on average, comfortable and pleasant, with gradually decreasing rainfall. Common activities: Maple viewing (if Iwakuni has related scenic spots), outdoor activities. Recommended clothing: Light jacket, long-sleeved shirt.
  • Winter (December–February): 6.5–8.3°C on average, cold and dry, with low rainfall. Common activities: Hot springs (if Iwakuni has related scenic spots), indoor activities. Recommended clothing: Warm jacket, sweater, scarf.

Iwakuni climatological average

Annual average temperature: approx. 17.8°C / Annual rainfall: approx. 1940 mm / Summer humidity: 70%–80% / Rainiest month: July

Iwakuni monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
6.5°C
54.5
February
7.1°C
101
March
11.3°C
166.4
April
16.3°C
238.8
May
19.4°C
199.4
June
23.3°C
297.4
July
28.2°C
306.2
August
30°C
137.9
September
27.6°C
190
October
20.4°C
77.9
November
15.2°C
129
December
8.3°C
41.6

Iwakuni weather for the next seven days

12/22
Monday
Sunny
10.7°C/4.8°C
12/23
Tuesday
Sunny
10.3°C/4°C
12/24
Wednesday
Moderate rain
12.8°C/8.7°C
12/25
Thursday
Patchy rain nearby
12.6°C/6°C
12/26
Friday
Patchy rain nearby
6.7°C/2.1°C
12/27
Saturday
Overcast
7.2°C/2.2°C
12/28
Sunday
Sunny
9.1°C/2.1°C

Iwakuni Frequently Asked Questions and Useful Information for Travel

What is Iwakuni known for?

Iwakuni is a peaceful town renowned for its stunning cherry blossoms and the unique Kintaikyo Bridge, a distinctive wooden arch bridge. As a historic castle town, it offers a glimpse into Japan's past.

How many military personnel are stationed at MCAS Iwakuni?

Marine Corps Air Station (MCAS) Iwakuni provides administrative support and conducts general military skills training for over 800 Marines and sailors stationed aboard the base.

What military installation is located in Iwakuni?

Marine Corps Air Station Iwakuni is a significant military base situated on the Nishiki River delta in Iwakuni City, located at the eastern end of Yamaguchi Prefecture on Japan's main island.

What is the typical weather like in Iwakuni?

Iwakuni experiences a climate similar to coastal North Carolina. Winters are mild with occasional snow, while summers are warm and humid. January, the coldest month, can see temperatures drop to around 34 degrees Fahrenheit, and August temperatures can reach up to 90 degrees Fahrenheit.

What are the main attractions in Iwakuni?

The most iconic attraction in Iwakuni is the Kintaikyo Bridge, a beautifully preserved wooden arch bridge. Visitors also enjoy exploring Iwakuni Castle, the Kikugahama Beach, and the scenic riverside areas, especially during cherry blossom season.