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The weather in September in Japan
It's warm in September in Japan with an average temperature of 27°C. Temperatures this month range from a low of 25°C to a high of 30°C. At night, you can expect temperatures between 19°C and 23°C.
Looking for sun? September isn’t a good month to be in Japan. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Japan. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 35°C in 2019, Japan reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 18°C in 2015. The extreme nighttime temperatures ranged from a lowest recorded value of 9°C to a highest value of 27°C.
Rainfall amount
In September, there is an average of 232 mm of precipitation, spread over 21 days. The wind speed is around 3 Bft, mostly coming from the Southeast.
Daily weather in September for Japan
Click on any day in September to get detailed info about the usual weather on that day in Japan. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Japan | New York | |
|---|---|---|
| Average temperature | 27°C | 27°C |
| Max. temperature | 30°C | 31°C |
| Min. temperature | 19°C | -5°C |
| Total precipitation | 232 mm | 57 mm |
| Rainy days | 21 days | 9 days |
Start of September
The month of September starts in Japan with hot temps, averaging around 29°C during the day and nights around 23°C.
Mid September
By mid-September, daytime temps drop to around 28°C, with nights around 22°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of September
By the end of September, the average daytime temperature in Japan is around 26°C, while nighttime temps are about 20°C. There’s a significant chance of many days with precipitation.
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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.
The typhoon season in Japan runs from June to November.
Check out the climate of Japan for all months and discover the best travel time
The climate in Japan is based on weather data from Tokyo. Other places, like Kyōto, Osaka or Hokkaido, might have different weather. You can check out all destinations in Japan to get the full picture of the climate.
Temperature charts
These charts show the average temperatures in September in Japan. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Japan
Temperature in September in Japan over the years
Precipitation charts
These charts show the average amount of precipitation in September in Japan. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Japan
Total precipitation in September in Japan over the years
Daily UV index in September in Japan
This chart shows the average daily UV index in September in Japan, 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.
Weather experiences in September in Japan
The weather in September in Japan is rated 3 out of 5 stars by 1 visitor. Have you been to Japan? Share your weather experience to help other visitors.
Write your own review
The days ranged from wonderfully sunny and warm and humid to rainy and stormy due to typhoon season. The air temperature remained at twenty degrees Celsius. Wearable, but you must be able to withstand hot and humid weather.— This text is automatically translated to English
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Average weather in Japan by month
Click on a month below to see detailed weather info for Japan. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.