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:
0°C
0°F
°C °F

Condition: Overcast

Pressure: 977 hPa

Feel like: -4 °C

Temperature: 0°C

Cloud: 96%

Humidity: 81%

Wind: ENE - 5 km/h

Visibility: 24.14 km

Weather forecast

Tue
17 Feb
0°C / 8°C
Slight Rain
Wed
18 Feb
-1°C / 2°C
Snow Showers Slight
Thu
19 Feb
-1°C / 8°C
Overcast
Fri
20 Feb
-1°C / 9°C
Overcast
Sat
21 Feb
1°C / 10°C
Overcast
Hourly forecast today:
19:00 PM
-3° / 0°
-3° / 0°
Overcast
81% 11 km/h
20:00 PM
-3° / -1°
-3° / -1°
Overcast
81% 11 km/h
21:00 PM
-4° / -1°
-4° / -1°
Overcast
79% 11 km/h
22:00 PM
-4° / -1°
-4° / -1°
Overcast
76% 9 km/h
23:00 PM
-4° / 0°
-4° / 0°
Overcast
73% 6 km/h
00:00 AM
-5° / 0°
-5° / 0°
Overcast
69% 4 km/h
01:00 AM
-4° / 1°
-4° / 1°
Partly Cloudy
64% 4 km/h
02:00 AM
-4° / 2°
-4° / 2°
Partly Cloudy
59% 5 km/h
03:00 AM
-4° / 4°
-4° / 4°
Partly Cloudy
55% 7 km/h
04:00 AM
-3° / 5°
-3° / 5°
Overcast
54% 9 km/h
05:00 AM
-2° / 5°
-2° / 5°
Overcast
54% 11 km/h

30 Day Averages and Extremes

  • Average high 5.47°C
  • Average low -2.07°C
  • Hottest day 13°C (22 February 2026)
  • Coldest day -9°C (08 February 2026)
  • Average humidity 71.57%
  • Days with precipitation 24 days
  • Highest precipitation 84 mm (10 February 2026)

Yesterday's Data

  • Max: 4°C
  • Min: 0°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 cold weather in Nagano, with temperatures ranging from 3ºC to 6ºC (37.4ºF to 42.8ºF), you should wear:
- Warm jacket or medium-weight coat
- Closed-toe shoes or boots
- Scarf to protect the neck area
- Long pants (jeans or other thick materials)

Temperature

Early
0°C / 4°C
Morning
-1°C / 1°C
Afternoon
-2°C / 0°C
Evening
-4°C / -1°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 0
  • CO 0
  • NH3 0
  • NO2 0
  • O3 0
  • PM10 0
  • PM25 0
  • SO2 0
  • CH4 0

Sunrise / Sunset

21:33
08:29