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:
17°C
62.6°F
°C °F

Condition: Partly Cloudy

Pressure: 975 hPa

Feel like: 18 °C

Temperature: 17°C

Cloud: 57%

Humidity: 82%

Wind: W - 7 km/h

Visibility: 21.72 km

Weather forecast

Sun
25 Oct
15°C / 17°C
Moderate Rain
Mon
26 Oct
10°C / 19°C
Drizzle
Tue
27 Oct
7°C / 12°C
Drizzle
Wed
28 Oct
3°C / 17°C
Fog
Thu
29 Oct
7°C / 22°C
Overcast
Hourly forecast today:
14:00 PM
14° / 17°
14° / 17°
Partly Cloudy
82% 15 km/h
15:00 PM
15° / 17°
15° / 17°
Partly Cloudy
83% 16 km/h
16:00 PM
15° / 17°
15° / 17°
Partly Cloudy
84% 15 km/h
17:00 PM
15° / 17°
15° / 17°
Partly Cloudy
86% 13 km/h
18:00 PM
14° / 17°
14° / 17°
Mainly Clear
86% 10 km/h
19:00 PM
14° / 17°
14° / 17°
Mainly Clear
87% 10 km/h
20:00 PM
15° / 16°
15° / 16°
Mainly Clear
90% 12 km/h
21:00 PM
15° / 17°
15° / 17°
Partly Cloudy
88% 11 km/h
22:00 PM
15° / 17°
15° / 17°
Mainly Clear
88% 14 km/h
23:00 PM
16° / 18°
16° / 18°
Partly Cloudy
86% 12 km/h
00:00 AM
17° / 18°
17° / 18°
Drizzle
89% 10 km/h

30 Day Averages and Extremes

  • Average high 18.87°C
  • Average low 9.83°C
  • Hottest day 29°C (20 October 2026)
  • Coldest day 0°C (07 November 2026)
  • Average humidity 73.53%
  • Days with precipitation 24 days
  • Highest precipitation 78 mm (19 October 2026)

Yesterday's Data

  • Max: 17°C
  • Min: 14°C
  • Total Precipitation: 29 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 mild weather in Nagano, with temperatures between 16ºC to 19ºC (60.8ºF to 66.2ºF), consider wearing:
- Scarf (optional)
- Light jacket (for cooler periods)
- Comfortable jeans or slacks
- Casual sneakers or loafers

Temperature

Early
14°C / 16°C
Morning
15°C / 16°C
Afternoon
15°C / 17°C
Evening
15°C / 17°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 480
  • CO 290
  • NH3 0
  • NO2 15
  • O3 35
  • PM10 5
  • PM25 4
  • SO2 5
  • CH4 1,414

Sunrise / Sunset

21:03
07:58