Onomichi Weather & Climate: Best Time to Visit

In Onomichi, temperatures differ significantly between summer and winter months. Typically, average maximum daytime temperatures range from a very warm 33°C (91°F) in August to a chilly 11°C (52°F) in the coolest month, January.

Nights vary from 25°C (77°F) in August to around 3°C (37°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Onomichi experiences significant rain/snowfall throughout the year, averaging 1370 mm (54 in) of precipitation annually. The climate in Onomichi shows significant variation throughout the year. Expect heavy rainfall in June, the wettest month, with an average of 203 mm (8 in) of precipitation over 16 rainy days.

In contrast, the driest month January offers drier and sunnier days, with around 56 mm (2.2 in) of rainfall over 16 rainy days. For more details, please visit our Onomichi Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Onomichi offers a pleasant mix of sunny and slightly overcast days. The difference in sunshine hours between May (7.1 hours daily) and January (4.6 hours daily) provides a bit of variety for visitors and residents.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Onomichi.

The city experiences its highest humidity in July, reaching 73%. In April, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year

The mean wind speed over the year ranges from 1 m/s (2 knots) in July to 3 m/s (6 knots) in October. What does this mean?

The mean monthly wind speed over the year (meters per second)