Hiroshima weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Excellent
Best time to visit: April – July, September – November
What is the weather like in Hiroshima in October?
In October, Hiroshima is warm: daytime highs average 22 °C, and nights cool down to about 17 °C. The sea averages 23.3 °C – pleasant for swimming. Expect around 6 hours of sunshine a day. Rain falls on about 8 days, adding up to 111 mm. All in all, October is an excellent month for a holiday in Hiroshima.
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 73 | 81 | 74 |
| Day | 26° | 22° | 17° |
| Night | 22° | 17° | 12° |
| Sea | 26° | 23° | 20° |
| Sun | 6 h | 6 h | 5 h |
| Rain days | 11 | 8 | 7 |
More details for October
- Daylight
- 11 h 23 min06:14 – 17:37
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 4 daysdew point 18 °C or moreAll months
- Wind
- 19 km/haverage daily peakAll months
- Cloud cover
- 49 %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 %100 %
- Sunshineweight 20 %47 %
- Few rainy daysweight 30 %71 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Swimwear
- Sunscreen
- Rain jacket or umbrella
Hiroshima in October: quick answers
Is Hiroshima hot in October?
Warm rather than hot: in October, daytime highs in Hiroshima average 22 °C and nights cool to about 17 °C.
Can you swim in Hiroshima in October?
Yes. In October the sea averages 23.3 °C – pleasant for swimming.
Does it rain much in Hiroshima in October?
Rain falls on about 8 days, adding up to 111 mm.
Hiroshima month by month
The whole year in HiroshimaAll destinations: JapanWhere to go in OctoberSea temperature in October
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