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:
16°C
60.8°F
°C °F

Condition: Mainly Clear

Pressure: 966 hPa

Feel like: 18 °C

Temperature: 16°C

Cloud: 45%

Humidity: 94%

Wind: NE - 3 km/h

Visibility: 18.54 km

Weather forecast

Tue
23 Jun
14°C / 27°C
Overcast
Wed
24 Jun
18°C / 27°C
Drizzle
Thu
25 Jun
18°C / 28°C
Thunderstorm With Slight
Fri
26 Jun
17°C / 24°C
Overcast
Sat
27 Jun
15°C / 25°C
Mainly Clear
Hourly forecast today:
17:00 PM
15° / 16°
15° / 16°
Mainly Clear
94% 21 km/h
18:00 PM
15° / 16°
15° / 16°
Partly Cloudy
94% 21 km/h
19:00 PM
15° / 16°
15° / 16°
Mainly Clear
93% 20 km/h
20:00 PM
15° / 16°
15° / 16°
Mainly Clear
94% 18 km/h
21:00 PM
15° / 16°
15° / 16°
Mainly Clear
92% 18 km/h
22:00 PM
15° / 17°
15° / 17°
Mainly Clear
87% 20 km/h
23:00 PM
15° / 18°
15° / 18°
Mainly Clear
82% 19 km/h
00:00 AM
15° / 20°
15° / 20°
Mainly Clear
72% 23 km/h
01:00 AM
14° / 21°
14° / 21°
Mainly Clear
65% 25 km/h
02:00 AM
14° / 22°
14° / 22°
Mainly Clear
61% 26 km/h
03:00 AM
14° / 23°
14° / 23°
Mainly Clear
58% 28 km/h

30 Day Averages and Extremes

  • Average high 25.3°C
  • Average low 16.27°C
  • Hottest day 34°C (03 July 2026)
  • Coldest day 0°C (06 July 2026)
  • Average humidity 72.0%
  • Days with precipitation 28 days
  • Highest precipitation 95 mm (20 June 2026)

Yesterday's Data

  • Max: 24°C
  • Min: 17°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
- Sunglasses
- Shorts or lightweight trousers

Temperature

Early
15°C / 24°C
Morning
16°C / 20°C
Afternoon
16°C / 17°C
Evening
15°C / 16°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 449
  • CO 114
  • NH3 0
  • NO2 2
  • O3 69
  • PM10 3
  • PM25 2
  • SO2 0
  • CH4 1,374

Sunrise / Sunset

19:29
10:09