Yamaguchi is one of several regions in Japan, with temperatures that range from 10°C (50°F) in January to 32°C (90°F) during the peak of August. We've based our full climate overview on data from Hagi, the region's most prominent city. For more detailed climate information about other cities in the area, please see the section beneath the map further down the page.
In Yamaguchi, the months of April, May, June and October bring pleasant weather, with average temperatures ranging between 20°C (68°F) and 27°C (81°F).
The peak heat season generally takes place in July and August.
Precipitation in Yamaguchi varies considerably throughout the year. The wettest conditions occur in July with 270 mm (11 in) of rain, while December stays relatively dry with 84 mm (3.3 in). The region experiences its rainy season during June, July and September, when monthly rainfall can range from 194 mm (7.6 in) to 270 mm (11 in).
