Iwakuni Weather in October
What's the weather like in Iwakuni (Yamaguchi) in October 2025?
The climate in Iwakuni during October can be summarized as mild and damp.
October is in the fall / autumn in Iwakuni and is typically the 6th warmest month of the year. Daytime maximum temperatures average around 22°C (71°F), whilst at night 13°C (55°F) is normal.
| Daytime temperature | 21.6°C 70.8°F |
|---|---|
| Nightly temperature | 12.9°C 55.1°F |
| Average temperature | 17.2°C 63°F |
| Daily sunshine | 6 hrs |
| Avg rainfall | 104 mm 4.1 ins |
| Rainy days | 12 days |
| Sea temperature | 23.3°C 73.9°F |
| Humidity | 72% |
| Windspeed | 8.3kph 5 mph |
On average October is the 5th driest month of the year in Iwakuni with around 104mm 4.1 inches of rain making it a damp time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.
On the flip side this corresponds to an average of 6 hours of sunshine per day.
October temperatures in Iwakuni
October rainfall
October hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Iwakuni in October 2025.
Other monthly averages
Best places to visit in October
Iwakuni weather stats
| Hottest month: | August | 30.3°C 86.5°F |
|---|---|---|
| Driest month: | December | 43mm 1.7ins |
| Sunniest month: | August | 7.2hrs |
| Coldest month: | January | 8.1°C 46.6°F |
| Wettest month: | June | 280mm 11ins |
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