Nagano monthly weather averages

  • Average daytime temperature

    The bar chart below shows the average monthly peak daytime temperatures at Nagano

    Nagano average temperature chart
    Average monthly temperatures in Nagano (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 2.7 3.5 7.7 15.8 21 23.6 27.3 29 23.6 17.4 11.8 6
    °F 36.9 38.3 45.9 60.4 69.7 74.5 81.2 84.2 74.6 63.3 53.3 42.7

    Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

  • Average rainfall & rainy days

    The graph below shows the average rainfall and number of rainy days per month.

    Average monthly rainfall in Nagano (mm and inches)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    mm 51 51 62 75 90 158 169 118 153 87 56 45
    inches 2 2 2.4 2.9 3.5 6.2 6.6 4.7 6 3.4 2.2 1.8
    Rainy days 22 21 20 16 16 19 21 18 19 15 16 19
  • Average daily sunshine

    The bar chart below shows the average daily sunshine hours in Nagano

    Average daily sunshine Nagano
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Hrs sunshine 5 5.3 6 6.5 7 5.2 5.3 6.3 4.5 5 5 5
  • Day / night temperatures

    The graph below shows the daily range of temperatures for each month.

    Maximum and minimum daily temperatures in Nagano (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Min °C -7 -6.4 -3.2 3.5 8.8 14.2 18.7 19.8 15.4 7.6 1.3 -4
    Max °C 3 3.8 8 16.1 21.3 23.9 27.6 29.3 23.9 17.6 12.1 6.2
    Min °F 19.5 20.6 26.2 38.3 47.8 57.5 65.6 67.6 59.6 45.7 34.3 24.8
    Max °F 28.4 29.7 36.3 49.6 59 66.2 73.6 76.1 67.3 54.7 44.1 34
  • Sea temperature

    The graph below shows the average sea temperature.

    Average sea temperature around Nagano in degrees centigrade and fahrenheit
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 13 11.5 11.4 12.7 15.6 19.3 22.8 25.7 24.5 21.5 18.6 15.6
    °F 55.4 52.6 52.6 54.9 60 66.8 73 78.2 76.1 70.7 65.4 60.2
  • Wind speed

    The graph below shows the average wind speed.

    Average wind speed in Nagano (mph and kmh)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    km/h 8 9 9 10 9 8 7 8 7 8 8 8
    mph 5 5 6 6 6 5 5 5 5 5 5 5

    A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

  • Relative humidity

    The graph below shows the average relative humidity.

    Average relative humidity in Nagano
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    75% 73% 69% 65% 67% 75% 79% 76% 79% 77% 75% 75%

Other monthly averages

UV index

Nagano weather stats

Nagano weather statistics
Hottest month: August 29°C 84.2°F
Driest month: December 45mm 1.8ins
Sunniest month: March 6hrs
Coldest month: January 2.7°C 36.9°F
Wettest month: July 169mm 6.7ins
Warmest sea: August 25.7°C 78.3°F
Map showing location of Nagano (36.65139, 138.18111)

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