JapanThe weather in September in Gunma
It's warm in September in Gunma with an average temperature of 28°C. Temperatures this month range from a low of 25°C to a high of 30°C. At night, you can expect temperatures between 18°C and 23°C.
Looking for sun? September isn’t a good month to be in Gunma. 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 Gunma, 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 36°C in 2023, Gunma reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 17°C in 2018. The extreme nighttime temperatures ranged from a lowest recorded value of 12°C to a highest value of 26°C.
Rainfall amount
In September, there is an average of 209 mm of precipitation, spread over 21 days. The wind speed is around 3 Bft, mostly coming from the South.
Daily weather in September for Gunma
Click on any day in September to get detailed info about the usual weather on that day in Gunma. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Gunma | New York | |
|---|---|---|
| Average temperature | 28°C | 27°C |
| Max. temperature | 30°C | 31°C |
| Min. temperature | 18°C | -5°C |
| Total precipitation | 209 mm | 57 mm |
| Rainy days | 21 days | 9 days |
Start of September
The month of September starts in Gunma 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 21°C. There’s a high chance of precipitation during this time.
End of September
By the end of September, the average daytime temperature in Gunma is around 26°C, while nighttime temps are about 19°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
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UV index
The UV index is a maximum of 6 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 Gunma runs from June to November.
Check out the climate of Gunma for all months and discover the best travel time
Curious about the weather in other parts of Japan? Check out the climate and weather for spots like Tokyo, Kyōto, Osaka, or explore other destinations in Japan.
Temperature charts
These charts show the average temperatures in September in Gunma, Japan. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Gunma
Temperature in September in Gunma over the years
Precipitation charts
These charts show the average amount of precipitation in September in Gunma, 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 Gunma
Total precipitation in September in Gunma over the years
Daily UV index in September in Gunma
This chart shows the average daily UV index in September in Gunma, 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 Gunma
Have you been to Gunma in September?
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Average weather in Gunma by month
Click on a month below to see detailed weather info for Gunma. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.