Hiroshima weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Fair
Best time to visit: April – July, September – November
What is the weather like in Hiroshima in December?
In December, Hiroshima is cool: daytime highs average 11 °C, and nights cool down to about 6 °C. The sea averages 16.9 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain falls on about 7 days, adding up to 58 mm. All in all, December is a so-so month for a holiday in Hiroshima.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 74 | 45 | 35 |
| Day | 17° | 11° | 9° |
| Night | 12° | 6° | 4° |
| Sea | 20° | 17° | 14° |
| Sun | 5 h | 5 h | 5 h |
| Rain days | 7 | 7 | 6 |
More details for December
- Daylight
- 9 h 53 min07:09 – 17:02
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 21 km/haverage daily peakAll months
- Cloud cover
- 50 %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 %31 %
- Sunshineweight 20 %25 %
- Few rainy daysweight 30 %81 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- A jumper for the evenings
Hiroshima in December: quick answers
Is Hiroshima hot in December?
No. In December, Hiroshima is cool: daytime highs average 11 °C and nights drop to about 6 °C.
Can you swim in Hiroshima in December?
Only if you don't mind cold water: in December the sea averages just 16.9 °C. Comfortable swimming is possible from June to November.
Does it rain much in Hiroshima in December?
Rain falls on about 7 days, adding up to 58 mm.
Hiroshima month by month
The whole year in HiroshimaAll destinations: JapanWhere to go in DecemberSea temperature in December
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