Hiroshima, Japan Weather

  1. Hiroshima, Japan Weather
  2. Current conditions
  3. Weather forecast
  4. Averages and extremes
  5. Yesterday's Data
  6. Temperature and possibility of rain in Hiroshima over the next 12 hours
  7. Temperature and possibility of rain in Hiroshima in the coming days
  8. Rainfall in Hiroshima in the coming days
  9. Hiroshima Weather Summary
  10. Weather averages by month
  11. Hiroshima's weather
  12. Frequently asked questions
  13. Comments
Hiroshima, Weather
(Photo by Griffin Quinn on Unsplash)

Current conditions

Updated:
31°C
87.8°F
°C °F

Condition: Clear Sky

Pressure: 1,004 hPa

Feel like: 37 °C

Temperature: 31°C

Cloud: 5%

Humidity: 60%

Wind: WNW - 1 km/h

Visibility: 30.2 km

Weather forecast

Thu
06 Aug
27°C / 36°C
Mainly Clear
Fri
07 Aug
25°C / 34°C
Overcast
Sat
08 Aug
24°C / 33°C
Overcast
Sun
09 Aug
24°C / 33°C
Thunderstorm With Slight
Mon
10 Aug
24°C / 29°C
Drizzle
Hourly forecast today:
10:00 AM
23° / 31°
23° / 31°
Clear Sky
60% 16 km/h
11:00 AM
23° / 30°
23° / 30°
Clear Sky
65% 14 km/h
12:00 PM
23° / 29°
23° / 29°
Clear Sky
70% 12 km/h
13:00 PM
23° / 28°
23° / 28°
Clear Sky
75% 7 km/h
14:00 PM
24° / 28°
24° / 28°
Mainly Clear
80% 8 km/h
15:00 PM
23° / 28°
23° / 28°
Clear Sky
77% 11 km/h
16:00 PM
22° / 28°
22° / 28°
Clear Sky
73% 13 km/h
17:00 PM
22° / 27°
22° / 27°
Clear Sky
75% 14 km/h
18:00 PM
22° / 27°
22° / 27°
Clear Sky
77% 15 km/h
19:00 PM
22° / 27°
22° / 27°
Clear Sky
78% 16 km/h
20:00 PM
23° / 26°
23° / 26°
Clear Sky
80% 18 km/h

30 Day Averages and Extremes

  • Average high 31.3°C
  • Average low 23.3°C
  • Hottest day 36°C (05 August 2026)
  • Coldest day 0°C (19 August 2026)
  • Average humidity 71.47%
  • Days with precipitation 26 days
  • Highest precipitation 56 mm (03 August 2026)

Yesterday's Data

  • Max: 34°C
  • Min: 26°C
  • Total Precipitation: 0 mm

Temperature and possibility of rain in Hiroshima over the next 12 hours

Temperature and possibility of rain in Hiroshima in the coming days

Rainfall in Hiroshima in the coming days

Hiroshima Climate Summary

Hiroshima features a Humid subtropical, no dry season (Köppen classification: Cfa), with an average annual temperature of 15.34ºC (59.61ºF), which is about 0.15% higher than the national average for Japan. Annually, the city experiences approximately 87.04 millimeters (3.43 inches) of rainfall, spread across 107.72 rainy days, accounting for 29.51% of the year.

Longitude 34.3852894
Latitude 132.4553055
Yearly high temperature 18.13ºC (64.63ºF)
Yearly low temperature 10.49ºC (50.88ºF)
Hottest month August 30.13ºC (86.23ºF)
Coldest month January 0.45ºC (32.81ºF)
Yearly precip 87.04mm (3.43in)
Days with rainfall 107.72 days (29.51%)
Driest month January (78.52%)
Wettest month July (84.79%)

Weather averages by month

Month High / Low (°C) Rain
January 6.65° / 0.45° 4.91 days
February 7.86° / 0.81° 6.82 days
March 11.71° / 3.42° 8.27 days
April 16.5° / 7.53° 9.0 days
May 21.95° / 12.36° 9.09 days
June 24.58° / 16.69° 13.82 days
July 28.21° / 21.06° 13.73 days
August 30.13° / 22.29° 11.45 days
September 25.92° / 18.21° 10.45 days
October 20.56° / 12.81° 7.09 days
November 14.86° / 7.7° 6.0 days
December 8.63° / 2.55° 7.09 days

Hiroshima's weather

Frequently asked questions

1. What is the hottest month in Hiroshima?

August has the highest average monthly temperature (daily mean of 30.13ºC) and January are the coolest (daily mean of 0.45ºC).

2. What should I wear in Hiroshima today?

For today's very hot weather in Hiroshima, with the high temperatures above 36ºC (96.8ºF), consider wearing:
- Sleeveless tops or vests
- Lightweight, loose-fitting shorts
- Broad-brimmed sun hat
- Light, natural fabrics (like cotton or linen)

Temperature

Early
25°C / 33°C
Morning
23°C / 33°C
Afternoon
23°C / 28°C
Evening
23°C / 26°C

Air quality

Unhealthy for Sensitive Groups

Unhealthy for Sensitive Groups air quality, health effects possible for sensitive people, general public usually unaffected

  • CO2 483
  • CO 523
  • NH3 0
  • NO2 8
  • O3 114
  • PM10 12
  • PM25 11
  • SO2 4
  • CH4 1,836

Sunrise / Sunset

20:24
10:07