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:
18°C
64.4°F
°C °F

Condition: Clear Sky

Pressure: 978 hPa

Feel like: 19 °C

Temperature: 18°C

Cloud: 16%

Humidity: 75%

Wind: NE - 3 km/h

Visibility: 9.88 km

Weather forecast

Sun
11 Oct
13°C / 25°C
Mainly Clear
Mon
12 Oct
12°C / 24°C
Partly Cloudy
Tue
13 Oct
12°C / 21°C
Moderate Drizzle
Wed
14 Oct
8°C / 17°C
Drizzle
Thu
15 Oct
6°C / 19°C
Overcast
Hourly forecast today:
10:00 AM
14° / 18°
14° / 18°
Clear Sky
75% 15 km/h
11:00 AM
14° / 18°
14° / 18°
Clear Sky
80% 10 km/h
12:00 PM
13° / 17°
13° / 17°
Clear Sky
79% 6 km/h
13:00 PM
13° / 17°
13° / 17°
Clear Sky
80% 5 km/h
14:00 PM
13° / 16°
13° / 16°
Clear Sky
82% 9 km/h
15:00 PM
12° / 15°
12° / 15°
Clear Sky
82% 9 km/h
16:00 PM
12° / 15°
12° / 15°
Clear Sky
82% 8 km/h
17:00 PM
11° / 15°
11° / 15°
Clear Sky
81% 9 km/h
18:00 PM
10° / 14°
10° / 14°
Clear Sky
77% 9 km/h
19:00 PM
10° / 14°
10° / 14°
Clear Sky
77% 8 km/h
20:00 PM
10° / 14°
10° / 14°
Clear Sky
77% 6 km/h

30 Day Averages and Extremes

  • Average high 21.13°C
  • Average low 12.73°C
  • Hottest day 25°C (29 September 2026)
  • Coldest day 6°C (15 October 2026)
  • Average humidity 77.23%
  • Days with precipitation 22 days
  • Highest precipitation 85 mm (25 September 2026)

Yesterday's Data

  • Max: 25°C
  • Min: 13°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 warm weather in Nagano, with temperatures between 21ºC to 24ºC (69.8ºF to 75.2ºF), you might consider wearing:
- Sun hat or cap
- T-shirt or short-sleeve blouse
- Cotton or linen fabrics
- Sunscreen (if spending time outdoors)

Temperature

Early
12°C / 23°C
Morning
14°C / 20°C
Afternoon
12°C / 15°C
Evening
9°C / 13°C

Air quality

Moderate

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

  • CO2 458
  • CO 287
  • NH3 0
  • NO2 10
  • O3 105
  • PM10 12
  • PM25 11
  • SO2 4
  • CH4 1,426

Sunrise / Sunset

20:50
08:17