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:
15°C
59.0°F
°C °F

Condition: Overcast

Pressure: 1,016 hPa

Feel like: 14 °C

Temperature: 15°C

Cloud: 78%

Humidity: 68%

Wind: NNE - 9 km/h

Visibility: 24.14 km

Weather forecast

Mon
19 Jan
8°C / 11°C
Overcast
Tue
20 Jan
6°C / 9°C
Overcast
Wed
21 Jan
4°C / 6°C
Overcast
Thu
22 Jan
4°C / 8°C
Overcast
Fri
23 Jan
4°C / 7°C
Drizzle
Hourly forecast today:
16:00 PM
9° / 15°
9° / 15°
Overcast
68% 14 km/h
17:00 PM
9° / 15°
9° / 15°
Overcast
68% 15 km/h
18:00 PM
9° / 15°
9° / 15°
Overcast
68% 16 km/h
19:00 PM
9° / 15°
9° / 15°
Overcast
69% 15 km/h
20:00 PM
9° / 15°
9° / 15°
Overcast
70% 14 km/h
21:00 PM
10° / 15°
10° / 15°
Overcast
71% 13 km/h
22:00 PM
10° / 15°
10° / 15°
Overcast
72% 12 km/h
23:00 PM
10° / 15°
10° / 15°
Overcast
72% 12 km/h
00:00 AM
10° / 15°
10° / 15°
Overcast
72% 12 km/h
01:00 AM
9° / 15°
9° / 15°
Overcast
70% 16 km/h
02:00 AM
9° / 15°
9° / 15°
Overcast
68% 21 km/h

30 Day Averages and Extremes

  • Average high 9.53°C
  • Average low 4.03°C
  • Hottest day 16°C (14 January 2026)
  • Coldest day 0°C (25 January 2026)
  • Average humidity 65.07%
  • Days with precipitation 22 days
  • Highest precipitation 34 mm (14 January 2026)

Yesterday's Data

  • Max: 16°C
  • Min: 6°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 mild weather in Nagasaki, with temperatures between 12ºC to 15ºC (53.6ºF to 59.0ºF), consider wearing:
- Casual sneakers or loafers
- Lightweight sweater or cardigan
- Comfortable jeans or slacks
- Long-sleeve shirt or blouse

Temperature

Early
2°C / 14°C
Morning
9°C / 16°C
Afternoon
9°C / 15°C
Evening
10°C / 15°C

Air quality

Moderate

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

  • CO2 500
  • CO 526
  • NH3 0
  • NO2 55
  • O3 8
  • PM10 25
  • PM25 22
  • SO2 17
  • CH4 1,654

Sunrise / Sunset

22:21
08:40