Hiroshima weather in January
Temperature, sea and sunshine in January: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in January
Poor
Best time to visit: April – July, September – November
What is the weather like in Hiroshima in January?
In January, Hiroshima is cold: daytime highs average 9 °C, and nights cool down to about 4 °C. The sea averages 14.1 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain falls on about 6 days, adding up to 51 mm. All in all, January is not an ideal month for a holiday in Hiroshima.
January compared
How the weather changes from December to February. Tap a month to open it.
| DecemberDec | JanuaryJan | FebruaryFeb | |
|---|---|---|---|
| Score | 45 | 35 | 36 |
| Day | 11° | 9° | 10° |
| Night | 6° | 4° | 4° |
| Sea | 17° | 14° | 13° |
| Sun | 5 h | 5 h | 5 h |
| Rain days | 7 | 6 | 8 |
More details for January
- Daylight
- 10 h 5 min07:16 – 17:21
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 21 km/haverage daily peakAll months
- Cloud cover
- 54 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+9Asia/Tokyo
How the score comes together
- Temperatureweight 50 %9 %
- Sunshineweight 20 %25 %
- Few rainy daysweight 30 %85 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in January
- Warm jacket
Hiroshima in January: quick answers
Is Hiroshima hot in January?
No. In January, Hiroshima is cold: daytime highs average 9 °C and nights drop to about 4 °C.
Can you swim in Hiroshima in January?
Only if you don't mind cold water: in January the sea averages just 14.1 °C. Comfortable swimming is possible from June to November.
Does it rain much in Hiroshima in January?
Rain falls on about 6 days, adding up to 51 mm.
Hiroshima month by month
The whole year in HiroshimaAll destinations: JapanWhere to go in JanuarySea temperature in January
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences