Nagasaki, Japan Weather

  1. Nagasaki, Japan Weather
  2. Current conditions
  3. Weather forecast
  4. Averages and extremes
  5. Yesterday's Data
  6. Temperature and possibility of rain in Nagasaki over the next 12 hours
  7. Temperature and possibility of rain in Nagasaki in the coming days
  8. Rainfall in Nagasaki in the coming days
  9. Nagasaki Weather Summary
  10. Weather averages by month
  11. Nagasaki's weather
  12. Frequently asked questions
  13. Comments
Nagasaki, Weather
(Photo by Sora Sagano on Unsplash)

Current conditions

Updated:
25°C
77.0°F
°C °F

Condition: Overcast

Pressure: 1,004 hPa

Feel like: 27 °C

Temperature: 25°C

Cloud: 89%

Humidity: 78%

Wind: NE - 11 km/h

Visibility: 29.4 km

Weather forecast

Sun
06 Sep
26°C / 30°C
Overcast
Mon
07 Sep
24°C / 32°C
Drizzle
Tue
08 Sep
21°C / 27°C
Thunderstorm With Slight
Wed
09 Sep
21°C / 25°C
Thunderstorm With Slight
Thu
10 Sep
23°C / 27°C
Slight Thunderstorm
Hourly forecast today:
22:00 PM
21° / 25°
21° / 25°
Overcast
78% 33 km/h
23:00 PM
21° / 25°
21° / 25°
Overcast
77% 37 km/h
00:00 AM
21° / 25°
21° / 25°
Partly Cloudy
76% 40 km/h
01:00 AM
21° / 26°
21° / 26°
Partly Cloudy
75% 40 km/h
02:00 AM
21° / 26°
21° / 26°
Partly Cloudy
74% 45 km/h
03:00 AM
22° / 27°
22° / 27°
Overcast
73% 49 km/h
04:00 AM
22° / 27°
22° / 27°
Partly Cloudy
73% 50 km/h
05:00 AM
22° / 27°
22° / 27°
Overcast
75% 52 km/h
06:00 AM
22° / 26°
22° / 26°
Drizzle
78% 52 km/h
07:00 AM
22° / 27°
22° / 27°
Partly Cloudy
75% 50 km/h
08:00 AM
22° / 27°
22° / 27°
Partly Cloudy
77% 48 km/h

30 Day Averages and Extremes

  • Average high 29.87°C
  • Average low 23.97°C
  • Hottest day 34°C (21 August 2026)
  • Coldest day 21°C (08 September 2026)
  • Average humidity 80.13%
  • Days with precipitation 30 days
  • Highest precipitation 84 mm (03 September 2026)

Yesterday's Data

  • Max: 29°C
  • Min: 23°C
  • Total Precipitation: 0 mm

Temperature and possibility of rain in Nagasaki over the next 12 hours

Temperature and possibility of rain in Nagasaki in the coming days

Rainfall in Nagasaki in the coming days

Nagasaki Climate Summary

Nagasaki features a Humid subtropical, no dry season (Köppen classification: Cfa), with an average annual temperature of 17.96ºC (64.33ºF), which is about 2.77% higher than the national average for Japan. Annually, the city experiences approximately 127.61 millimeters (5.02 inches) of rainfall, spread across 140.16 rainy days, accounting for 38.4% of the year.

Longitude 32.7503334
Latitude 129.8778888
Yearly high temperature 19.42ºC (66.96ºF)
Yearly low temperature 15.6ºC (60.08ºF)
Hottest month August 29.52ºC (85.14ºF)
Coldest month December 8.47ºC (47.25ºF)
Yearly precip 127.61mm (5.02in)
Days with rainfall 140.16 days (38.4%)
Driest month January (70.01%)
Wettest month July (86.33%)

Weather averages by month

Month High / Low (°C) Rain
January 9.87° / 6.63° 9.09 days
February 10.87° / 7.11° 9.27 days
March 13.79° / 9.46° 9.27 days
April 17.6° / 13.08° 10.36 days
May 21.57° / 17.12° 9.18 days
June 24.03° / 20.5° 17.09 days
July 27.35° / 23.97° 19.18 days
August 29.52° / 25.73° 16.91 days
September 26.7° / 22.86° 14.36 days
October 22.47° / 18.42° 6.91 days
November 17.44° / 13.82° 8.36 days
December 11.87° / 8.47° 10.18 days

Nagasaki's weather

Frequently asked questions

1. What is the hottest month in Nagasaki?

August has the highest average monthly temperature (daily mean of 29.52ºC) and December are the coolest (daily mean of 8.47ºC).

2. What should I wear in Nagasaki today?

For today's very hot weather in Nagasaki, with the high temperatures above 27ºC (80.6ºF), consider wearing:
- Loose and airy fabrics like linen or cotton
- Thin, moisture-wicking socks
- Wide-brimmed sun hat
- Open-toed sandals or light sneakers

Temperature

Early
21°C / 28°C
Morning
21°C / 27°C
Afternoon
20°C / 26°C
Evening
20°C / 25°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 443
  • CO 154
  • NH3 0
  • NO2 6
  • O3 75
  • PM10 9
  • PM25 6
  • SO2 3
  • CH4 1,427

Sunrise / Sunset

20:58
09:39