Normal weather for Nagano in September
It's warm in September in Nagano with an average temperature of 26°C. Temperatures this month range from a low of 24°C to a high of 30°C. At night, you can expect temperatures between 14°C and 21°C.
In September, there is an average of 127 mm of precipitation, spread over 16 days. The wind speed is around 3 Bft, mostly coming from the Southwest.
Nagano in September |
New York | ||
|---|---|---|---|
 Average Temperature |
26°C | 27°C | |
 High Temp |
30°C | 31°C | |
| Low Temp |
24°C | 21°C | |
 Total Precipitation |
127 mm | 57 mm | |
| Rainy Days |
16 days | 9 days | |
Start of September
The month of September starts in Nagano with hot temps, averaging around 29°C during the day and nights around 21°C. There are plenty of days with a good chance of precipitation.
With the temperature difference between day and night, it’s smart to wear layers. For the daytime, light clothing like shorts or a dress, and a hat and sunglasses are perfect. In the evening and morning, a T-shirt, light pants or skirt, and a light jacket are ideal.
Mid September
By mid-September, daytime temps drop to around 27°C, with nights around 19°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
Since it cools down at night, it’s a good idea to wear layers. For the daytime, light clothing like shorts or a dress, and a hat and sunglasses are perfect. For the evening and morning, a shirt, maybe a light sweater, and thin pants are recommended.
End of September
By the end of September, the average daytime temperature in Nagano is around 25°C, while nighttime temps are about 16°C. A shower might pop up, but overall, the weather will be dry and sunny.
Because temperatures drop in the evening, wearing layers is recommended. A T-shirt, light pants or skirt, and a light jacket are great for the day. For the evening and morning, a shirt, maybe a light sweater, and thin pants are recommended.
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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.
Is September a good time to visit Nagano?
Looking for sun? September isn’t a good month to be in Nagano. The temperature is nice, but there’s too much chance of rain.
The typhoon season in Nagano runs from June to November.
Temperature records for Nagano in September
Check out the climate of Nagano 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.
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Daily Temperature in September in Nagano
This chart shows the average daily high and low temperatures in September for Nagano, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Nagano
The chart below shows the average daily precipitation in September for Nagano, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed 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 it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 16 days of precipitation in Nagano.
Daily UV Index in September in Nagano
This chart shows the average daily UV index in September in Nagano, 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 Nagano Over the Years
This chart shows the average temperature in September in Nagano, measured in degrees Celsius, over the past few years.
Total Precipitation in September in Nagano Over the Years
This chart shows the average precipitation in September in Nagano, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily Climate in September for Nagano
Click on any day in September to get detailed info about the usual weather on that day in Nagano. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Nagano
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Average Weather in Nagano by Month
Click on a month below to see detailed weather info for Nagano. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
