Measurements:
°C
°F
Nagasaki
64°F
E 1 mph
Feels like: 64°F
Precip: 19%
World Resorts Japan Nagasaki Weather September Weather in Nagasaki

Nagasaki Weather: September

Average Day Temperature: 86.4°F
Average Night Temperature: 77.5°F
Sea Water Temperature: 83.8°F
Number of Sunny Days: 11 days
Sunshine Hours: 11.9 - 12.8 hours
Number of Rainy Days: 8 days
Precipitation Totals: 5.9 in

Air Temperature in September, °F

Select Year: 2026 2025 2024

The highest day temperature in September 2026 was 90°F. The lowest night temperature was 74°F. The average values for day and night temperatures during September were 83.0°F и 77.9°F respectivly.

Nagasaki Water Sea Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Nagasaki was 85.5°F. The maximum and minimum values were 82.8°F and 90.2°F respectively.

Sunny, Cloudy and Gloomy days

You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.

Precipitation Totals in September, in

Precipitation total in September for Nagasaki is 5.9 in.

Wind Speed in September, mph

The average wind speed in September is 8.0 mph.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Nagasaki in September is 7.3 hours.

Best Time to Visit Nagasaki
The most sunny months:
October 17 days
May 14 days
August 13 days
The most warm months:
August 91.6 °F
July 88.2 °F
September 86.4 °F
Warmest sea temperature:
August 86.5 °F
September 83.8 °F
July 82.3 °F
The most cold months:
January 50.4 °F
February 52.0 °F
December 54.1 °F
The most rainy months:
July 11 days
June 11 days
August 9 days
The most windy months:
January 11 mph
February 11 mph
December 11 mph

Nagasaki on the Weather Map

Japan Resorts:
NAME
F°
Atami +52
Fukuoka +56
Hakone +50
Hiroshima +58
Kamakura +52
Kobe +58
Kyoto +52
Nagasaki +64
Nagoya +52
Noboribetsu +42
Okinawa +74
Osaka +56
Sapporo +40
Tokyo +52
Yokohama +52
24 Hours Weather Forecast
Nagasaki
Local time: 23:24
13 nov, friday
0000 64°F
E
1 mph
0300 62°F
SW
2 mph
0600 62°F
SW
4 mph
0900 64°F
SW
3 mph
1200 68°F
NW
1 mph
1500 68°F
E
1 mph
1800 66°F
SE
1 mph
2100 64°F
W
1 mph