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:
23°C
73.4°F
°C °F

Condition: Clear Sky

Pressure: 970 hPa

Feel like: 25 °C

Temperature: 23°C

Cloud: 16%

Humidity: 75%

Wind: WSW - 6 km/h

Visibility: 8.64 km

Weather forecast

Wed
05 Aug
24°C / 33°C
Mainly Clear
Thu
06 Aug
24°C / 35°C
Moderate Drizzle
Fri
07 Aug
23°C / 29°C
Drizzle
Sat
08 Aug
22°C / 29°C
Drizzle
Sun
09 Aug
23°C / 29°C
Drizzle
Hourly forecast today:
22:00 PM
18° / 23°
18° / 23°
Clear Sky
75% 22 km/h
23:00 PM
19° / 25°
19° / 25°
Mainly Clear
72% 22 km/h
00:00 AM
20° / 26°
20° / 26°
Clear Sky
69% 22 km/h
01:00 AM
21° / 28°
21° / 28°
Clear Sky
65% 21 km/h
02:00 AM
21° / 29°
21° / 29°
Mainly Clear
60% 19 km/h
03:00 AM
20° / 31°
20° / 31°
Mainly Clear
55% 21 km/h
04:00 AM
20° / 32°
20° / 32°
Mainly Clear
52% 25 km/h
05:00 AM
21° / 32°
21° / 32°
Mainly Clear
51% 29 km/h
06:00 AM
21° / 32°
21° / 32°
Mainly Clear
51% 35 km/h
07:00 AM
21° / 32°
21° / 32°
Mainly Clear
54% 39 km/h
08:00 AM
21° / 31°
21° / 31°
Mainly Clear
56% 38 km/h

30 Day Averages and Extremes

  • Average high 30.57°C
  • Average low 22.37°C
  • Hottest day 35°C (06 August 2026)
  • Coldest day 19°C (11 August 2026)
  • Average humidity 76.5%
  • Days with precipitation 28 days
  • Highest precipitation 89 mm (26 July 2026)

Yesterday's Data

  • Max: 32°C
  • Min: 22°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 32ºC (89.6ºF), consider wearing:
- Light, natural fabrics (like cotton or linen)
- Broad-brimmed sun hat
- Sleeveless tops or vests
- UV-blocking sunglasses

Temperature

Early
20°C / 29°C
Morning
19°C / 29°C
Afternoon
17°C / 23°C
Evening
18°C / 22°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 453
  • CO 137
  • NH3 0
  • NO2 3
  • O3 59
  • PM10 10
  • PM25 8
  • SO2 2
  • CH4 1,410

Sunrise / Sunset

19:56
09:50