Weather in Hiroshima - 14-day forecast

Detailed weather forecast for Hiroshima, Japan: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.

Forecast for the next days in Hiroshima

today☁️ 29°💧 0.1 mm

Thu☁️ 29°💧 0.3 mm

Fri🌤️ 29°💧 1.1 mm

Sat☁️ 29°💧 2.6 mm

Sun🌧️ 29°💧 0.1 mm

Mon🌧️ 30°💧 1.9 mm

Tue🌧️ 30°💧 2.4 mm

Wed🌤️ 30°💧 0.6 mm

14-day forecast - Hiroshima

📅 Hiroshima 30 & 45-day weather - long-range outlook

Next 16 days · forecast

29°

around 24° at night · days with rain: 10

Weeks 3-4 · avg for July

31°

around 24° at night · rain chance 45%

Weeks 5-7 · avg for August

31°

around 25° at night · rain chance 45%

The 30 & 45-day outlook for Hiroshima: the next 16 days are a numerical forecast updated daily - on average 29° by day and 24° at night. Further out we rely on multi-year climate averages: around 31° in July, and about 31° in August. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Hiroshima

Wednesday8 July 2026

☁️29°broken clouds

sunrise 05:04 · sunset 19:26 · night 25° · evening 27° · rain 0.14 mm · humidity 75% · wind 3 m/s · clouds 78%

Thursday9 July 2026

☁️29°overcast clouds

sunrise 05:05 · sunset 19:25 · night 25° · evening 27° · rain 0.27 mm · humidity 76% · wind 2 m/s · clouds 94%

Friday10 July 2026

🌤️29°a few clouds

sunrise 05:05 · sunset 19:25 · night 24° · evening 27° · rain 1.05 mm · humidity 65% · wind 3 m/s · clouds 19%

Saturday11 July 2026

☁️29°overcast clouds

sunrise 05:06 · sunset 19:25 · night 24° · evening 27° · rain 2.61 mm · humidity 70% · wind 2 m/s · clouds 100%

Sunday12 July 2026

🌧️29°light rain

sunrise 05:07 · sunset 19:24 · night 24° · evening 26° · rain 0.11 mm · humidity 69% · wind 2 m/s · clouds 100%

Monday13 July 2026

🌧️30°light rain

sunrise 05:07 · sunset 19:24 · night 24° · evening 26° · rain 1.92 mm · humidity 66% · wind 3 m/s · clouds 95%

Tuesday14 July 2026

🌧️30°light rain

sunrise 05:08 · sunset 19:24 · night 24° · evening 27° · rain 2.43 mm · humidity 64% · wind 2 m/s · clouds 99%

Wednesday15 July 2026

🌤️30°scattered clouds

sunrise 05:08 · sunset 19:23 · night 24° · evening 26° · rain 0.57 mm · humidity 65% · wind 3 m/s · clouds 45%

Thursday16 July 2026

☀️30°clear sky

sunrise 05:09 · sunset 19:23 · night 24° · evening 26° · rain 3.84 mm · humidity 63% · wind 3 m/s · clouds 6%

Friday17 July 2026

🌧️31°moderate rain

sunrise 05:10 · sunset 19:22 · night 25° · evening 28° · rain 7.35 mm · humidity 62% · wind 3 m/s · clouds 93%

Saturday18 July 2026

🌧️31°light rain

sunrise 05:10 · sunset 19:22 · night 25° · evening 29° · rain 6.57 mm · humidity 70% · wind 2 m/s · clouds 41%

Sunday19 July 2026

🌧️30°light rain

sunrise 05:11 · sunset 19:21 · night 26° · evening 28° · rain 2.19 mm · humidity 70% · wind 2 m/s · clouds 100%

Monday20 July 2026

🌧️29°light rain

sunrise 05:12 · sunset 19:21 · night 25° · evening 27° · rain 1.38 mm · humidity 70% · wind 2 m/s · clouds 80%

Tuesday21 July 2026

🌧️24°moderate rain

sunrise 05:12 · sunset 19:20 · night 24° · evening 25° · rain 18.18 mm · humidity 97% · wind 2 m/s · clouds 100%

Wednesday22 July 2026

🌧️30°light rain

sunrise 05:13 · sunset 19:20 · night 22° · evening 27° · rain 0.12 mm · humidity 54% · wind 3 m/s · clouds 82%

Thursday23 July 2026

☀️29°clear sky

sunrise 05:14 · sunset 19:19 · night 22° · evening 26° · humidity 51% · wind 3 m/s · clouds 1%

☀️ UV index in Hiroshima - is it safe to sunbathe?

Today the UV index in Hiroshima is 8 (high) - unprotected fair skin can burn in about 25 minutes. SPF 30-50, a hat and sunglasses are a must. Better stay in shade between 11:00 and 15:00.

🌊 Sea temperature - Hiroshima

Water today

26°C

Week avg

26°C

Waves today

0.3 m

How's the water?

warm

16-day sea temperature forecast:

8.07 26°C9.07 26°C10.07 26°C11.07 26°C12.07 27°C13.07 26°C14.07 27°C15.07 27°C16.07 27°C

Average sea temperature through the year:

Jan 12°CFeb 10°CMar 11°CApr 15°CMay 19°CJun 22°CJul 27°CAug 30°CSep 29°COct 24°CNov 20°CDec 15°C

Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

Air quality and smog in Hiroshima

City	PM2.5 (µg/m³)	PM10 (µg/m³)	Air quality
Kōbe Shi	24.8	30.2	good
Yokohama	18.9	22.9	good
Osaka City	18.5	23.4	good
Sagamihara-shi	17.8	22.9	good
Nagoya	14.7	20.2	good
Saitama-shi	13.8	18.6	good
Kioto	13.3	17.5	good
Kitakyushu City	12.7	16.2	very good
Okayama Shi	11.5	15.4	very good
Chiba	11	14.8	very good
Fukuoka City	9.7	10.8	very good
Hiroshima City	9.4	12.5	very good
Sendai	9.1	12.8	very good
Kumamoto Shi	6.7	7.2	very good

Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-07-08, 10:00).

Hiroshima weather through the year

Warmest, driest months on average: April, May, June, September.

🎉 Public holidays in Hiroshima - when are the long weekends?

Next long weekend in Hiroshima: Marine Day (20 July, Monday) - Saturday–Monday (3 days off).

20 JulyMonday

Marine Day

🎈 long weekend

11 AugustTuesday

Mountain Day

🎈 long weekend + bridge day

21 SeptemberMonday

Respect for the Aged Day

🎈 long weekend

23 SeptemberWednesday

Autumnal Equinox Day

12 OctoberMonday

Sports Day

🎈 long weekend

3 NovemberTuesday

Culture Day

🎈 long weekend + bridge day

23 NovemberMonday

Labour Thanksgiving Day

🎈 long weekend

1 JanuaryFriday 2027

New Year's Day

🎈 long weekend

11 JanuaryMonday 2027

Coming of Age Day

🎈 long weekend

11 FebruaryThursday 2027

Foundation Day

🎈 long weekend + bridge day

23 FebruaryTuesday 2027

The Emperor's Birthday

🎈 long weekend + bridge day

21 MarchSunday 2027

Vernal Equinox Day

falls on a weekend

Public holidays (statutory days off) - shops, offices and some attractions may be closed. A "bridge day" is a workday between a holiday and the weekend worth taking as leave.

Nearby places

FukuokashiOsakaKyoto

FAQ - Hiroshima weather

What is the weather like in Hiroshima today?

Today it is about 29° during the day and 25° at night, broken clouds.

How far ahead can I check the forecast for Hiroshima?

This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.