Spring
Spring in Hiroshima is when the year becomes walkable again. March, April and May are mixed: bright days, wet days, and the odd reminder that winter has not fully left.
In Hiroshima the meteorological summer is June, July and August and winter is December, January and February. This is a good month-range for a city break that wants outdoor hours without betting the packing list on heat. Carry a shell.
Read Hiroshima in this stretch as its own climate, not as a generic holiday season copied from another destination.

