Verdict: Good month
Hiroshima Weather in December
December is mild-to-cool in Hiroshima, topping out near 11°C (52°F) — comfortable with a layer on. Rain is occasional — about 4 wet days in a typical year. Overall, December is a solid month to visit Hiroshima.
Average high
11°C / 52°F
Average low
2°C / 36°F
Rain days
~4
Precipitation
31 mm
What to pack for Hiroshima in December
- A proper warm jacket, and a hat for mornings
- Comfortable walking shoes — every guide on this site assumes you'll use them
December against the rest of the year
Warmest in Hiroshima: Aug (31°C / 88°F) · Coolest: Jan (9°C / 48°F) · Wettest: Jul (~17 rain days)
9°
1°
Jan
10°
1°
Feb
14°
4°
Mar
18°
8°
Apr
22°
13°
May
25°
18°
Jun
29°
23°
Jul
31°
24°
Aug
28°
21°
Sep
22°
13°
Oct
17°
8°
Nov
11°
2°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)