Nagano, Japan Weather

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

Current conditions

Updated:
19°C
66.2°F
°C °F

Condition: Heavy Rain

Pressure: 963 hPa

Feel like: 21 °C

Temperature: 19°C

Cloud: 91%

Humidity: 92%

Wind: WSW - 10 km/h

Visibility: 2.66 km

Weather forecast

Sun
21 Jun
18°C / 22°C
Overcast
Mon
22 Jun
15°C / 22°C
Drizzle
Tue
23 Jun
14°C / 24°C
Overcast
Wed
24 Jun
16°C / 28°C
Overcast
Thu
25 Jun
19°C / 22°C
Moderate Rain Showers
Hourly forecast today:
13:00 PM
18° / 19°
18° / 19°
Heavy Rain
92% 20 km/h
14:00 PM
18° / 19°
18° / 19°
Moderate Rain
91% 30 km/h
15:00 PM
17° / 19°
17° / 19°
Drizzle
90% 33 km/h
16:00 PM
17° / 19°
17° / 19°
Slight Rain
91% 33 km/h
17:00 PM
17° / 19°
17° / 19°
Drizzle Dense Intensity
90% 25 km/h
18:00 PM
17° / 19°
17° / 19°
Mainly Clear
89% 16 km/h
19:00 PM
17° / 19°
17° / 19°
Mainly Clear
87% 13 km/h
20:00 PM
17° / 19°
17° / 19°
Mainly Clear
86% 15 km/h
21:00 PM
17° / 20°
17° / 20°
Mainly Clear
85% 20 km/h
22:00 PM
18° / 21°
18° / 21°
Mainly Clear
82% 21 km/h
23:00 PM
18° / 22°
18° / 22°
Mainly Clear
79% 21 km/h

30 Day Averages and Extremes

  • Average high 24.93°C
  • Average low 16.93°C
  • Hottest day 31°C (04 July 2026)
  • Coldest day 12°C (10 June 2026)
  • Average humidity 78.1%
  • Days with precipitation 29 days
  • Highest precipitation 85 mm (20 June 2026)

Yesterday's Data

  • Max: 23°C
  • Min: 19°C
  • Total Precipitation: 38 mm

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

Temperature and possibility of rain in Nagano in the coming days

Rainfall in Nagano in the coming days

Nagano Climate Summary

Nagano features a Humid continental, no dry season, warm summer (Köppen classification: Dfb), with an average annual temperature of 11.13ºC (52.03ºF), which is about -4.06% lower than the national average for Japan. Annually, the city experiences approximately 78.61 millimeters (3.09 inches) of rainfall, spread across 162.09 rainy days, accounting for 44.41% of the year.

Longitude 36.6485258
Latitude 138.1950371
Yearly high temperature 14.42ºC (57.96ºF)
Yearly low temperature 5.16ºC (41.29ºF)
Hottest month August 28.16ºC (82.69ºF)
Coldest month February -6.3ºC (20.66ºF)
Yearly precip 78.61mm (3.09in)
Days with rainfall 162.09 days (44.41%)
Driest month November (80.74%)
Wettest month July (82.97%)

Weather averages by month

Month High / Low (°C) Rain
January 0.5° / -6.67° 14.09 days
February 1.66° / -6.3° 11.27 days
March 6.41° / -2.47° 12.27 days
April 12.66° / 2.44° 10.27 days
May 19.78° / 7.86° 10.18 days
June 22.91° / 11.87° 14.82 days
July 26.52° / 17.0° 21.18 days
August 28.16° / 17.88° 19.55 days
September 23.27° / 13.72° 12.91 days
October 16.93° / 7.43° 10.09 days
November 10.58° / 2.39° 10.82 days
December 3.7° / -3.22° 14.64 days

Nagano's weather

Frequently asked questions

1. What is the hottest month in Nagano?

August has the highest average monthly temperature (daily mean of 28.16ºC) and February are the coolest (daily mean of -6.3ºC).

2. What should I wear in Nagano today?

For today's very hot weather in Nagano, with the high temperatures above 26ºC (78.8ºF), consider wearing:
- Sunscreen for skin protection
- Lightweight t-shirt or tank top
- Thin, moisture-wicking socks
- Loose and airy fabrics like linen or cotton

Temperature

Early
18°C / 23°C
Morning
18°C / 19°C
Afternoon
17°C / 19°C
Evening
17°C / 20°C

Air quality

Moderate

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

  • CO2 461
  • CO 200
  • NH3 0
  • NO2 12
  • O3 47
  • PM10 2
  • PM25 2
  • SO2 1
  • CH4 1,428

Sunrise / Sunset

19:28
10:09