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:
25°C
77.0°F
°C °F

Condition: Mainly Clear

Pressure: 969 hPa

Feel like: 28 °C

Temperature: 25°C

Cloud: 24%

Humidity: 77%

Wind: WSW - 8 km/h

Visibility: 1.42 km

Weather forecast

Thu
06 Aug
24°C / 34°C
Drizzle
Fri
07 Aug
23°C / 30°C
Drizzle
Sat
08 Aug
21°C / 28°C
Drizzle
Sun
09 Aug
21°C / 28°C
Drizzle
Mon
10 Aug
19°C / 28°C
Partly Cloudy
Hourly forecast today:
14:00 PM
21° / 25°
21° / 25°
Mainly Clear
77% 14 km/h
15:00 PM
21° / 25°
21° / 25°
Clear Sky
79% 14 km/h
16:00 PM
21° / 24°
21° / 24°
Clear Sky
81% 15 km/h
17:00 PM
21° / 24°
21° / 24°
Clear Sky
82% 15 km/h
18:00 PM
21° / 24°
21° / 24°
Mainly Clear
83% 15 km/h
19:00 PM
21° / 24°
21° / 24°
Mainly Clear
83% 14 km/h
20:00 PM
21° / 24°
21° / 24°
Mainly Clear
83% 15 km/h
21:00 PM
21° / 24°
21° / 24°
Mainly Clear
83% 15 km/h
22:00 PM
22° / 25°
22° / 25°
Mainly Clear
80% 20 km/h
23:00 PM
22° / 27°
22° / 27°
Clear Sky
76% 22 km/h
00:00 AM
22° / 28°
22° / 28°
Clear Sky
71% 22 km/h

30 Day Averages and Extremes

  • Average high 28.57°C
  • Average low 20.77°C
  • Hottest day 34°C (06 August 2026)
  • Coldest day 0°C (19 August 2026)
  • Average humidity 73.73%
  • Days with precipitation 28 days
  • Highest precipitation 89 mm (26 July 2026)

Yesterday's Data

  • Max: 33°C
  • Min: 21°C
  • Total Precipitation: 0 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 33ºC (91.4ºF), consider wearing:
- Lightweight, loose-fitting shorts
- Broad-brimmed sun hat
- Sleeveless tops or vests
- High SPF sunscreen for outdoor activities

Temperature

Early
18°C / 30°C
Morning
21°C / 30°C
Afternoon
21°C / 25°C
Evening
21°C / 24°C

Air quality

Moderate

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

  • CO2 454
  • CO 148
  • NH3 0
  • NO2 15
  • O3 45
  • PM10 20
  • PM25 19
  • SO2 3
  • CH4 1,402

Sunrise / Sunset

19:57
09:49