Jōetsu monthly weather averages

Contents

Average daytime temperature

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

Jōetsu average temperature chart (Celsius) Jōetsu average temperature chart (Fahrenheit)
Average monthly temperatures in Jōetsu (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 4.9 5.2 8.6 16.2 21.2 24.3 28.5 30.4 25.6 19.8 14.2 8.6
°F 40.8 41.4 47.5 61.2 70.2 75.8 83.3 86.8 78.1 67.7 57.6 47.4

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.

Jōetsu monthly rainfall chart (mm) Jōetsu monthly rainfall chart (inches)
Average monthly rainfall in Jōetsu (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 345 213 154 89 96 149 203 164 211 188 260 335
inches 13.6 8.4 6.1 3.5 3.8 5.9 8 6.5 8.3 7.4 10.2 13.2
Rainy days 28 26 25 18 17 19 19 17 20 19 22 27

Average annual rainfall in Jōetsu: 2583.833mm (1017.3 inches)

Average daily sunshine

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

Jōetsu average daily sunshine chart
Average daily sunshine Jōetsu
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 2.9 3.7 5.1 6.4 7.1 5.5 5.6 6.7 4.7 4.9 4.1 3.4

Day / night temperatures

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

Jōetsu average minimum / maximum temperatures (Celsius) Jōetsu average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Jōetsu (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -2.5 -2.4 -0.5 5.3 10.5 15.9 20.5 21.8 17.4 10.6 5 0.4
Max °C 5.1 5.4 8.9 16.5 21.5 24.6 28.7 30.7 25.8 20.1 14.5 8.8
Min °F 27.6 27.7 31.2 41.5 50.9 60.5 68.9 71.2 63.3 51 40.9 32.8
Max °F 34.3 34.7 39.6 51.6 60.8 68.4 76.3 79.2 70.9 59.5 49.5 40.3

Sea temperature

The graph below shows the average sea temperature.

Jōetsu average sea temperature chart (Celsius) Jōetsu average sea temperature chart (Fahrenheit)
Average sea temperature around Jōetsu in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 11.4 9.6 9.5 10.8 13.7 18 21.9 25.2 24 20.8 17.5 14.3
°F 52.5 49.3 49.1 51.4 56.7 64.5 71.5 77.4 75.2 69.5 63.6 57.8

Wind speed

The graph below shows the average wind speed.

Jōetsu average winspeed by month (km/h) Jōetsu average winspeed by month (mph)
Average wind speed in Jōetsu (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 10 10 10 10 9 8 7 7 7 8 9 10
mph 7 6 6 6 5 5 4 5 5 5 5 6

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.

Jōetsu relative humidity averages
Average relative humidity in Jōetsu
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
77% 75% 70% 66% 69% 76% 80% 77% 78% 76% 75% 76%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Jōetsu weather stats

Jōetsu weather statistics
Hottest month: August 30.4°C 86.7°F
Driest month: April 89mm 3.5ins
Sunniest month: May 7.1hrs
Coldest month: January 4.9°C 40.8°F
Wettest month: January 345mm 13.6ins
Warmest sea: August 25.2°C 77.4°F
Map showing location of Jōetsu (37.14828, 138.23642) Jōetsu map pin © Google

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