Iiyama monthly weather averages

Average daytime temperature

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

Iiyama average temperature chart (Celsius) Iiyama average temperature chart (Fahrenheit)
Average monthly temperatures in Iiyama (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 1.9 2.5 6.5 14.4 19.5 22.4 26.2 28 22.7 16.8 11.2 5.3
°F 35.5 36.6 43.6 57.9 67.1 72.3 79.2 82.4 72.8 62.2 52.1 41.5

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.

Iiyama monthly rainfall chart (mm) Iiyama monthly rainfall chart (inches)
Average monthly rainfall in Iiyama (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 111 84 78 79 95 158 182 153 176 114 103 107
inches 4.4 3.3 3.1 3.1 3.7 6.2 7.2 6 6.9 4.5 4 4.2
Rainy days 25 23 22 17 17 20 21 19 20 17 19 23

Average annual rainfall in Iiyama: 1613.534mm (635.2 inches)

Average daily sunshine

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

Iiyama average daily sunshine chart
Average daily sunshine Iiyama
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 4.3 4.7 5.8 6.5 6.9 5.2 5.2 6.2 4.4 4.9 4.7 4.4

Day / night temperatures

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

Iiyama average minimum / maximum temperatures (Celsius) Iiyama average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Iiyama (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -6.8 -6.4 -3.5 2.8 8 13.4 18 19.2 14.8 7.4 1.4 -3.7
Max °C 2.2 2.8 6.7 14.7 19.8 22.6 26.4 28.2 22.9 17 11.4 5.5
Min °F 19.9 20.6 25.7 37 46.4 56.1 64.4 66.6 58.6 45.3 34.5 25.3
Max °F 27.9 28.8 34.9 47.7 57 64.4 72 74.7 65.8 54 43.5 33.6

Sea temperature

The graph below shows the average sea temperature.

Iiyama average sea temperature chart (Celsius) Iiyama average sea temperature chart (Fahrenheit)
Average sea temperature around Iiyama 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.

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

Iiyama relative humidity averages
Average relative humidity in Iiyama
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
76% 74% 70% 67% 68% 77% 81% 78% 80% 77% 75% 75%

Other monthly averages

UV index Best time to go?

Iiyama weather stats

Iiyama weather statistics
Hottest month: August 28°C 82.4°F
Driest month: March 78mm 3.1ins
Sunniest month: April 6.5hrs
Coldest month: January 1.9°C 35.4°F
Wettest month: July 182mm 7.2ins
Warmest sea: August 25.7°C 78.3°F
Map showing location of Iiyama (36.85, 138.36667) Iiyama map pin © Google

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