Temperatures in September
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.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Japan 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 Japan with hot temperatures, averaging around 29°C during the day and nights close to 23°C. Plenty of days with a chance of precipitation.
Mid-September
By mid-September, the average daytime temperature drops to around 28°C, with nights close to 22°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
End of September
By the end of September, the average daytime temperature in Japan will be around 26°C, with nights close to 20°C. There’s a significant chance of many days with precipitation.
As it gets cooler in the evening, it’s best to wear layers.
Discover cheap holidays to Japan 
Precipitation in September
In September, there is an average of 232 mm of precipitation, spread over 14 days. The wind speed is around 3 Bft, mostly coming from the Southeast.
The average precipitation chance is 48% per day this month. Though it seems average, the weather’s variable. Some days have higher, others lower precipitation chances.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Japan. 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.
Japan in September |
UK | ||
|---|---|---|---|
 Average Temperature |
27°C | 20°C | |
 High Temp |
30°C | 22°C | |
| Low Temp |
25°C | 17°C | |
 Total Precipitation |
232 mm | 44 mm | |
| Rainy Days |
14 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 Japan?
After some sun? Then September isn’t the best time to be in Japan. The temperature is pleasant, but there’s too much chance of rain this month.
The typhoon season in Japan runs from June to November.
Temperature records for Japan in September
With 35°C, Japan hit the highest temperature in the last 10 years in September 2019. The lowest daytime temperature in this month was 18°C in 2015. The extreme night temperatures ranged from a low of 9°C to a high of 27°C.
Check out the climate of Japan for all months and discover the best travel time
The climate of Japan is based on weather data from Tokyo. Other spots, like Kyōto, Osaka or Hokkaido, might have different weather. You can check out all destinations in Japan for a full picture of the climate.
Plan your next holiday
Don’t miss the best holiday deals for Japan and see what our partners have for you.
Daily Temperature in September in Japan
This chart shows the average daily temperatures, both day and night, for each day in September in Japan, 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.
Weather experiences in September in Japan
Okay
The days ranged from wonderfully sunny and warm and humid to... more
Daily Precipitation in September in Japan
The chart below shows the average daily precipitation in September for Japan, 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 14 days of rain in Japan.
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.
Temperature in September in Japan Over the Years
This chart shows the average temperature in September in Japan, measured in degrees Celsius, over the past years.
Total Precipitation in September in Japan Over the Years
This chart shows the average precipitation in September in Japan, 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 Japan
Click on a specific day in September for detailed info on the typical weather on that day in Japan. Check out the historical temperatures and precipitation over the past 10 years on this day.
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 20 degrees Celsius. Wearable, but you have to be able to withstand hot and humid weather.— This text is automatically translated to English
Have you been to Japan in September?
Share your weather experience in September in Japan.
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.
