Hiroshima Historic Weather Records

Analyse hottest, coldest, windiest & wettest days

Hiroshima Weather Trend Graph


Temperature (°C)
.
Months
Max Temp.
Historic Max Temp.
Min Temp.
Historic Min Temp.

Yearly Summary 2026


35°C
Highest Temp
2 Aug. 26

-5°C
Lowest Temp
9 Feb. 26


Seasonal Breakdown

Hottest MonthAugust34.4°C

Coldest MonthJanuary0.32°C

Wettest MonthJune13.15mm

Windiest MonthJanuary20.69km/h

Frequently Asked Questions


1. What is the hottest month in Hiroshima historically?

August is historically Hiroshima's hottest month, with average maximum temperatures around 31°C. During peak heatwave events, the highest recorded temperatures have reached 36°C on 2018-08-07.

2. What is the coldest month in Hiroshima historically?

January is Hiroshima's coldest month, with average minimum temperatures around 1°C. The all-time record low of -5°C was recorded on 2011-01-16.

3. What is the average annual rainfall in Hiroshima over the past 17 years?

Hiroshima's average annual rainfall is approximately 1720.8mm, based on records spanning 17 years.

4. How many rainy days does Hiroshima experience on average per year?

Hiroshima historically records approximately 177.8 rainy days per year. July has the highest number of rain days at an average of 20.8 days.

5. What is the all-time highest temperature ever recorded in Hiroshima?

The all-time highest temperature recorded in Hiroshima is 36°C on 2018-08-07.

6. What is the all-time lowest temperature ever recorded in Hiroshima?

The all-time lowest temperature recorded in Hiroshima is -5°C on 2011-01-16.

7. What is the windiest time of year in Hiroshima historically?

Hiroshima experiences its strongest winds during January. The historic gust record of 52.9 kph was recorded on 2019-09-23.

8. What is the highest and lowest humidity in Hiroshima during a year?

Usually, Hiroshima's humidity peaks in July at around 84.2% and drops to its lowest in April at approximately 74.005%.