Verdict: Fair month
Hiroshima Weather in January
January is properly cold in Hiroshima, with highs of only 9°C (48°F). Rain is occasional — about 7 wet days in a typical year. January is workable in Hiroshima if your dates are fixed — just plan around the conditions.
Average high
9°C / 48°F
Average low
1°C / 34°F
Rain days
~7
Precipitation
60 mm
What to pack for Hiroshima in January
- A proper warm jacket, and a hat for mornings
- A packable rain shell or compact umbrella earns its space
- Comfortable walking shoes — every guide on this site assumes you'll use them
January 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)