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: Overcast

Pressure: 967 hPa

Feel like: 26 °C

Temperature: 23°C

Cloud: 100%

Humidity: 78%

Wind: WSW - 6 km/h

Visibility: 3.18 km

Weather forecast

Sun
21 Jun
18°C / 25°C
Drizzle
Mon
22 Jun
16°C / 23°C
Drizzle
Tue
23 Jun
15°C / 24°C
Overcast
Wed
24 Jun
19°C / 26°C
Moderate Drizzle
Thu
25 Jun
19°C / 24°C
Moderate Drizzle
Hourly forecast today:
00:00 AM
19° / 23°
19° / 23°
Overcast
78% 23 km/h
01:00 AM
19° / 24°
19° / 24°
Mainly Clear
75% 25 km/h
02:00 AM
19° / 24°
19° / 24°
Partly Cloudy
73% 25 km/h
03:00 AM
19° / 25°
19° / 25°
Overcast
68% 27 km/h
04:00 AM
19° / 25°
19° / 25°
Overcast
67% 28 km/h
05:00 AM
19° / 25°
19° / 25°
Overcast
70% 27 km/h
06:00 AM
18° / 23°
18° / 23°
Overcast
74% 24 km/h
07:00 AM
20° / 21°
20° / 21°
Moderate Drizzle
91% 23 km/h
08:00 AM
19° / 21°
19° / 21°
Moderate Rain
93% 19 km/h
09:00 AM
19° / 20°
19° / 20°
Slight Rain
93% 19 km/h
10:00 AM
19° / 20°
19° / 20°
Slight Rain
92% 20 km/h

30 Day Averages and Extremes

  • Average high 24.0°C
  • Average low 16.37°C
  • Hottest day 29°C (16 June 2026)
  • Coldest day 0°C (03 July 2026)
  • Average humidity 74.93%
  • Days with precipitation 28 days
  • Highest precipitation 89 mm (20 June 2026)

Yesterday's Data

  • Max: 25°C
  • Min: 19°C
  • Total Precipitation: 15 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 20ºC to 23ºC (68.0ºF to 73.4ºF), you might consider wearing:
- Light, breathable socks
- T-shirt or short-sleeve blouse
- Sun hat or cap
- Cotton or linen fabrics

Temperature

Early
19°C / 25°C
Morning
19°C / 20°C
Afternoon
18°C / 19°C
Evening
18°C / 19°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 448
  • CO 176
  • NH3 0
  • NO2 5
  • O3 81
  • PM10 8
  • PM25 7
  • SO2 11
  • CH4 1,376

Sunrise / Sunset

19:28
10:09