Iwanuma monthly weather averages

Contents

Average daytime temperature

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

Iwanuma average temperature chart (Celsius) Iwanuma average temperature chart (Fahrenheit)
Average monthly temperatures in Iwanuma (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 5.4 5.7 9.2 15.3 20.2 22.8 26.1 28.6 24.4 19.2 13.8 8.5
°F 41.7 42.3 48.6 59.6 68.4 73 79.1 83.4 76 66.6 56.8 47.2

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.

Iwanuma monthly rainfall chart (mm) Iwanuma monthly rainfall chart (inches)
Average monthly rainfall in Iwanuma (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 42 50 70 89 102 124 137 144 167 106 66 36
inches 1.7 2 2.7 3.5 4 4.9 5.4 5.7 6.6 4.2 2.6 1.4
Rainy days 23 21 20 17 16 19 21 19 20 17 18 21

Average annual rainfall in Iwanuma: 1312.2mm (516.6 inches)

Average daily sunshine

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

Iwanuma average daily sunshine chart
Average daily sunshine Iwanuma
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.2 5.6 6.2 6.6 7 5.3 5 6 4.5 5.1 4.9 4.9

Day / night temperatures

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

Iwanuma average minimum / maximum temperatures (Celsius) Iwanuma average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Iwanuma (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -2 -1.7 0.8 6.1 11.2 15.7 19.7 21.7 17.4 10.8 5.2 0.8
Max °C 5.6 5.9 9.4 15.6 20.5 23 26.3 28.8 24.6 19.5 14 8.7
Min °F 28.5 28.9 33.4 42.9 52.1 60.2 67.5 71 63.3 51.4 41.4 33.4
Max °F 35.2 35.8 41.2 51.4 60.4 66.7 73.4 77.4 69.8 59.2 49.3 40.5

Sea temperature

The graph below shows the average sea temperature.

Iwanuma average sea temperature chart (Celsius) Iwanuma average sea temperature chart (Fahrenheit)
Average sea temperature around Iwanuma in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 11.6 9.8 9.7 11.4 14.5 18.5 21.7 24.5 23.4 20.3 17.4 14.5
°F 52.9 49.7 49.5 52.6 58.1 65.2 71 76.2 74.2 68.6 63.3 58.1

Wind speed

The graph below shows the average wind speed.

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

Iwanuma relative humidity averages
Average relative humidity in Iwanuma
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
68% 67% 64% 66% 70% 79% 83% 81% 80% 74% 70% 69%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Iwanuma weather stats

Iwanuma weather statistics
Hottest month: August 28.6°C 83.5°F
Driest month: December 36mm 1.4ins
Sunniest month: March 6.2hrs
Coldest month: January 5.4°C 41.7°F
Wettest month: September 167mm 6.6ins
Warmest sea: August 24.5°C 76.1°F
Map showing location of Iwanuma (38.10472, 140.85944) Iwanuma map pin © Google

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