Itoigawa monthly weather averages

Average daytime temperature

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

Itoigawa average temperature chart (Celsius) Itoigawa average temperature chart (Fahrenheit)
Average monthly temperatures in Itoigawa (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 4.4 4.8 8.4 15.9 20.8 23.9 28.1 30 25.2 19.4 13.8 8.1
°F 40 40.7 47.2 60.7 69.5 75.1 82.6 86.1 77.4 66.9 56.9 46.6

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.

Itoigawa monthly rainfall chart (mm) Itoigawa monthly rainfall chart (inches)
Average monthly rainfall in Itoigawa (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 284 181 138 95 100 155 200 156 207 168 223 279
inches 11.2 7.1 5.4 3.7 3.9 6.1 7.9 6.2 8.2 6.6 8.8 11
Rainy days 29 26 25 18 17 18 19 17 20 19 23 27

Average annual rainfall in Itoigawa: 2361.1mm (929.6 inches)

Average daily sunshine

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

Itoigawa average daily sunshine chart
Average daily sunshine Itoigawa
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 2.7 3.5 5.1 6.4 7.1 5.5 5.6 6.8 4.8 4.9 3.9 3.1

Day / night temperatures

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

Itoigawa average minimum / maximum temperatures (Celsius) Itoigawa average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Itoigawa (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -2.6 -2.6 -0.5 5.2 10.3 15.7 20.3 21.6 17.2 10.4 4.8 0.3
Max °C 4.6 5 8.7 16.2 21.1 24.2 28.3 30.3 25.4 19.6 14.1 8.3
Min °F 27.3 27.3 31.2 41.4 50.5 60.2 68.5 70.8 63 50.7 40.6 32.5
Max °F 33.8 34.2 39.4 51.3 60.3 67.8 75.7 78.6 70.3 59 48.9 39.7

Sea temperature

The graph below shows the average sea temperature.

Itoigawa average sea temperature chart (Celsius) Itoigawa average sea temperature chart (Fahrenheit)
Average sea temperature around Itoigawa in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 11.4 9.8 9.7 10.9 13.9 18.3 22.2 25.5 24.1 20.9 17.5 14.3
°F 52.5 49.6 49.4 51.6 57.1 64.9 71.9 77.9 75.5 69.6 63.6 57.8

Wind speed

The graph below shows the average wind speed.

Itoigawa average winspeed by month (km/h) Itoigawa average winspeed by month (mph)
Average wind speed in Itoigawa (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 11 10 10 10 9 8 8 8 8 9 9 10
mph 7 7 6 7 6 5 5 5 5 5 6 7

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.

Itoigawa relative humidity averages
Average relative humidity in Itoigawa
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
78% 76% 71% 67% 69% 77% 80% 77% 78% 76% 76% 77%

Other monthly averages

UV index Best time to go?

Itoigawa weather stats

Itoigawa weather statistics
Hottest month: August 30°C 86°F
Driest month: April 95mm 3.7ins
Sunniest month: May 7.1hrs
Coldest month: January 4.4°C 39.9°F
Wettest month: January 284mm 11.2ins
Warmest sea: August 25.5°C 77.9°F
Map showing location of Itoigawa (37.03333, 137.85) Itoigawa map pin © Google

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