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:
19°C
66.2°F
°C °F

Condition: Clear Sky

Pressure: 1,011 hPa

Feel like: 20 °C

Temperature: 19°C

Cloud: 0%

Humidity: 64%

Wind: W - 2 km/h

Visibility: 24.98 km

Weather forecast

Tue
12 May
16°C / 24°C
Moderate Rain
Wed
13 May
14°C / 24°C
Drizzle
Thu
14 May
16°C / 26°C
Clear Sky
Fri
15 May
15°C / 25°C
Clear Sky
Sat
16 May
16°C / 26°C
Mainly Clear
Hourly forecast today:
10:00 AM
12° / 19°
12° / 19°
Clear Sky
64% 12 km/h
11:00 AM
14° / 18°
14° / 18°
Clear Sky
74% 10 km/h
12:00 PM
13° / 18°
13° / 18°
Mainly Clear
75% 8 km/h
13:00 PM
13° / 17°
13° / 17°
Clear Sky
78% 7 km/h
14:00 PM
13° / 17°
13° / 17°
Clear Sky
78% 11 km/h
15:00 PM
13° / 17°
13° / 17°
Mainly Clear
79% 12 km/h
16:00 PM
13° / 16°
13° / 16°
Clear Sky
81% 13 km/h
17:00 PM
14° / 16°
14° / 16°
Clear Sky
86% 14 km/h
18:00 PM
13° / 16°
13° / 16°
Clear Sky
87% 20 km/h
19:00 PM
13° / 16°
13° / 16°
Clear Sky
83% 21 km/h
20:00 PM
12° / 16°
12° / 16°
Clear Sky
80% 19 km/h

30 Day Averages and Extremes

  • Average high 22.47°C
  • Average low 15.57°C
  • Hottest day 26°C (14 May 2026)
  • Coldest day 12°C (28 April 2026)
  • Average humidity 76.9%
  • Days with precipitation 21 days
  • Highest precipitation 82 mm (29 April 2026)

Yesterday's Data

  • Max: 24°C
  • Min: 15°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 25ºC (77.0ºF), consider wearing:
- Sunscreen for skin protection
- Lightweight t-shirt or tank top
- Open-toed sandals or light sneakers
- Thin, moisture-wicking socks

Temperature

Early
11°C / 23°C
Morning
12°C / 21°C
Afternoon
13°C / 17°C
Evening
12°C / 16°C

Air quality

Moderate

Acceptable air quality, some pollutants present, minor health concerns for sensitive individuals

  • CO2 450
  • CO 216
  • NH3 0
  • NO2 6
  • O3 99
  • PM10 10
  • PM25 9
  • SO2 9
  • CH4 1,436

Sunrise / Sunset

20:24
10:09