Temperatures in September
It's warm in September in Hiroshima with an average temperature of 29°C. Temperatures this month range from a low of 27°C to a high of 31°C. At night, you can expect temperatures between 20°C and 25°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Hiroshima in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Hiroshima with hot temperatures, averaging around 31°C during the day and nights close to 24°C. Plenty of days with a chance of precipitation. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
Mid-September
By mid-September, the average daytime temperature drops to around 29°C, with nights close to 23°C. The chance of precipitation is high during this period.
End of September
By the end of September, the average daytime temperature in Hiroshima will be around 28°C, with nights close to 21°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
As it gets cooler in the evening, it’s best to wear layers.
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Precipitation in September
In September, there is an average of 187 mm of precipitation, spread over 9 days. The wind speed is around 4 Bft, mostly coming from the East.
The average precipitation chance is 30% per day this month.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Hiroshima. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Hiroshima in September |
London | ||
|---|---|---|---|
 Average Temperature |
29°C | 20°C | |
 High Temp |
31°C | 22°C | |
| Low Temp |
27°C | 17°C | |
 Total Precipitation |
187 mm | 44 mm | |
| Rainy Days |
9 days | 8 days | |
August
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is September a good time to visit Hiroshima?
After some sun? Then September isn’t the best time to be in Hiroshima. The temperature is pleasant, but there’s too much chance of rain this month.
The typhoon season in Hiroshima runs from June to November.
Temperature records for Hiroshima in September
With 36°C, Hiroshima hit the highest temperature in the last 10 years in September 2023. The lowest daytime temperature in this month was 19°C in 2018. The extreme night temperatures ranged from a low of 14°C to a high of 28°C.
Check out the climate of Hiroshima for all months and discover the best travel time
Curious about the climate in other parts of Japan? Check out the weather and climate in places like Tokyo, Kyōto, Osaka, or have a look at other destinations in Japan.
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Daily Temperature in September in Hiroshima
This chart shows the average daily temperatures, both day and night, for each day in September in Hiroshima, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Hiroshima
The chart below shows the average daily precipitation in September for Hiroshima, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 9 days of rain in Hiroshima.
Daily UV Index in September in Hiroshima
This chart shows the average daily UV index in September in Hiroshima, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Hiroshima Over the Years
This chart shows the average temperature in September in Hiroshima, measured in degrees Celsius, over the past years.
Total Precipitation in September in Hiroshima Over the Years
This chart shows the average precipitation in September in Hiroshima, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Hiroshima
Click on a specific day in September for detailed info on the typical weather on that day in Hiroshima. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Hiroshima
Have you been to Hiroshima in September?
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Average Weather in Hiroshima by Month
Click on a month below to see detailed weather info for Hiroshima. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Hiroshima for all months at once
