Hiroshima Weather
Hiroshima weather today, the 14-day forecast, and average temperature, rain and what to wear for every month — compared against Hong Kong. Best months to visit: Apr, May, Sep, Oct and Nov.
Hiroshima current weather
Hiroshima now (local time 19:30)
17°C
Drizzle
- Feels like
- 18°
- Humidity
- 93%
- Wind
- 7 km/h
Next 7 days · what to wear
12° – 26°C
Rain likely on 2 of 7 days
👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings; big day–night swing, so dress in layers.
Hiroshima 14-day forecast
Today
10/4
🌧️
19°
17°
💧100%
Mon
10/5
🌦️
23°
18°
💧75%
Tue
10/6
🌤️
25°
17°
💧4%
Wed
10/7
🌦️
24°
14°
💧18%
Thu
10/8
☀️
24°
12°
💧0%
Fri
10/9
☀️
26°
12°
💧35%
Sat
10/10
☀️
25°
15°
💧35%
Sun
10/11
☀️
27°
16°
💧17%
Mon
10/12
🌤️
25°
16°
💧27%
Tue
10/13
⛅
26°
14°
💧32%
Wed
10/14
🌤️
25°
15°
💧20%
Thu
10/15
🌤️
26°
17°
💧20%
Fri
10/16
☁️
27°
19°
💧16%
Sat
10/17
🌦️
27°
19°
💧18%
Best time to visit Hiroshima
On temperature and rainfall, the most comfortable months in Hiroshima are Apr, May, Sep, Oct and Nov. The hottest month is August (average high 31°C) and the coldest is January (average low 1°C).
Hiroshima climate by month
| Month | Avg high | Avg low | Rain | Humidity | vs Hong Kong |
|---|---|---|---|---|---|
| Jan | 9°C | 1°C | 60 mm | 70% | -12°C |
| Feb | 10°C | 1°C | 78 mm | 70% | -12°C |
| Mar | 14°C | 4°C | 137 mm | 73% | -11°C |
| AprBest | 18°C | 8°C | 162 mm | 73% | -10°C |
| MayBest | 22°C | 13°C | 165 mm | 77% | -9°C |
| Jun | 25°C | 18°C | 221 mm | 83% | -7°C |
| Jul | 29°C | 23°C | 306 mm | 86% | -3°C |
| Aug | 31°C | 24°C | 253 mm | 80% | -1°C |
| SepBest | 29°C | 21°C | 161 mm | 78% | -4°C |
| OctBest | 22°C | 13°C | 61 mm | 73% | -8°C |
| NovBest | 17°C | 8°C | 89 mm | 74% | -10°C |
| Dec | 11°C | 2°C | 31 mm | 70% | -12°C |
Data: Open-Meteo historical weather, 2020–2024 averages (ERA5); Hong Kong comparison uses HKO 1991–2020 normals.
Hiroshima weather month by month: what to wear
Hiroshima in OctoberBest monthThis month
October in Hiroshima is pleasantly warm: average highs of 22°C and lows of 13°C, around 61 mm of rain (mostly dry) and 73% humidity — about 8°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings; big day–night swing, so dress in layers.
Hiroshima in NovemberBest month
November in Hiroshima is mild and cool: average highs of 17°C and lows of 8°C, around 89 mm of rain (some rain) and 74% humidity — about 10°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Long sleeves with a light jacket or sweater; big day–night swing, so dress in layers.
Hiroshima in December
December in Hiroshima is chilly: average highs of 11°C and lows of 2°C, around 31 mm of rain (mostly dry) and 70% humidity — about 12°C colder than Hong Kong.
👕 A sweater plus a coat or windbreaker.
Hiroshima in January
January in Hiroshima is cold: average highs of 9°C and lows of 1°C, around 60 mm of rain (mostly dry) and 70% humidity — about 12°C colder than Hong Kong.
👕 A warm coat over a sweater, plus a scarf.
Hiroshima in February
February in Hiroshima is chilly: average highs of 10°C and lows of 1°C, around 78 mm of rain (mostly dry) and 70% humidity — about 12°C colder than Hong Kong.
👕 A sweater plus a coat or windbreaker; big day–night swing, so dress in layers.
Hiroshima in March
March in Hiroshima is chilly: average highs of 14°C and lows of 4°C, around 137 mm of rain (some rain) and 73% humidity — about 11°C colder than Hong Kong.
👕 A sweater plus a coat or windbreaker; big day–night swing, so dress in layers.
Hiroshima in AprilBest month
April in Hiroshima is mild and cool: average highs of 18°C and lows of 8°C, around 162 mm of rain (wet) and 73% humidity — about 10°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Long sleeves with a light jacket or sweater; big day–night swing, so dress in layers; it's wet, so pack a compact umbrella.
Hiroshima in MayBest month
May in Hiroshima is pleasantly warm: average highs of 22°C and lows of 13°C, around 165 mm of rain (wet) and 77% humidity — about 9°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings; it's wet, so pack a compact umbrella.
Hiroshima in June
June in Hiroshima is pleasantly warm: average highs of 25°C and lows of 18°C, around 221 mm of rain (wet) and 83% humidity — about 7°C colder than Hong Kong.
👕 Short sleeves, plus a light layer for air-conditioned interiors; it's wet, so pack a compact umbrella.
Hiroshima in July
July in Hiroshima is warm to hot: average highs of 29°C and lows of 23°C, around 306 mm of rain (very wet) and 86% humidity — about 3°C colder than Hong Kong.
👕 Short sleeves, plus a light layer for air-conditioned interiors; it's wet, so pack a compact umbrella; humid, so quick-dry fabrics help.
Hiroshima in August
August in Hiroshima is hot: average highs of 31°C and lows of 24°C, around 253 mm of rain (very wet) and 80% humidity — about the same as Hong Kong.
👕 T-shirts, shorts and breathable fabrics; sunscreen and water; it's wet, so pack a compact umbrella; humid, so quick-dry fabrics help.
Hiroshima in SeptemberBest month
September in Hiroshima is warm to hot: average highs of 29°C and lows of 21°C, around 161 mm of rain (wet) and 78% humidity — about 4°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves, plus a light layer for air-conditioned interiors; it's wet, so pack a compact umbrella.
FAQ
›What is the best time to visit Hiroshima?
On temperature and rainfall, the most comfortable months in Hiroshima are Apr, May, Sep, Oct and Nov. The hottest month is August (average high 31°C) and the coldest is January (average low 1°C).
›What's the weather like in Hiroshima in October, and what should I wear?
October in Hiroshima is pleasantly warm: average highs of 22°C and lows of 13°C, around 61 mm of rain (mostly dry) and 73% humidity — about 8°C colder than Hong Kong. It's one of the most comfortable months of the year to visit. What to wear: Short sleeves with a light long-sleeve or jacket for cool mornings and evenings; big day–night swing, so dress in layers.
›What's the weather like in Hiroshima in November, and what should I wear?
November in Hiroshima is mild and cool: average highs of 17°C and lows of 8°C, around 89 mm of rain (some rain) and 74% humidity — about 10°C colder than Hong Kong. It's one of the most comfortable months of the year to visit. What to wear: Long sleeves with a light jacket or sweater; big day–night swing, so dress in layers.
›When is the rainy season in Hiroshima?
Hiroshima is wettest in July, with about 306 mm on average, and driest in December, with about 31 mm.
›How cold does Hiroshima get? Does it snow?
The coldest month is January, averaging 9°C by day and 1°C at night. Early mornings get close to freezing; snow is occasional.
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Forecast data: Open-Meteo.com (CC BY 4.0), refreshed every 3 hours. Hottest month: August; coldest: January.