Otaru monthly weather averages

Average daytime temperature

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

Otaru average temperature chart (Celsius) Otaru average temperature chart (Fahrenheit)
Average monthly temperatures in Otaru (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -3.8 -3.2 0.9 8.1 14.4 18.3 22 23.5 19.3 12.9 5.5 -0.8
°F 25.2 26.2 33.5 46.5 58 65 71.7 74.3 66.8 55.3 41.9 30.6

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.

Otaru monthly rainfall chart (mm) Otaru monthly rainfall chart (inches)
Average monthly rainfall in Otaru (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 139 108 84 70 70 77 97 152 144 134 138 140
inches 5.5 4.2 3.3 2.8 2.8 3 3.8 6 5.7 5.3 5.4 5.5
Rainy days 29 26 25 18 18 17 17 18 18 20 25 28

Average daily sunshine

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

Otaru average daily sunshine chart
Average daily sunshine Otaru
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 2.7 3.6 5.2 6.4 6.8 6.3 5.5 5.4 6 5.2 3.1 2.3

Day / night temperatures

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

Otaru average minimum / maximum temperatures (Celsius) Otaru average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Otaru (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -10.7 -10.7 -6.5 -0.4 5 9.9 14.7 16.1 10.7 4 -1.7 -7.2
Max °C -3.6 -3.1 1 8.3 14.7 18.5 22.2 23.7 19.6 13.2 5.7 -0.6
Min °F 12.8 12.8 20.3 31.3 41 49.9 58.4 60.9 51.3 39.2 28.9 19
Max °F 19.1 19.6 27.1 39.1 49.7 57.6 65.2 67.8 59.2 47.4 35.6 25

Sea temperature

The graph below shows the average sea temperature.

Otaru average sea temperature chart (Celsius) Otaru average sea temperature chart (Fahrenheit)
Average sea temperature around Otaru in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 5.4 4 4.4 6.2 9.3 13.5 17.9 21.1 20.4 16.6 12.2 8.4
°F 41.8 39.2 40 43.1 48.7 56.3 64.2 70 68.8 61.9 54 47.2

Wind speed

The graph below shows the average wind speed.

Otaru average winspeed by month (km/h) Otaru average winspeed by month (mph)
Average wind speed in Otaru (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 12 12 12 12 12 10 10 10 10 12 12 12
mph 8 7 7 8 7 6 6 6 6 7 8 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.

Otaru relative humidity averages
Average relative humidity in Otaru
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
75% 74% 72% 69% 71% 79% 82% 81% 76% 71% 71% 74%

Other monthly averages

UV index Best time to go?

Otaru weather stats

Otaru weather statistics
Hottest month: August 23.5°C 74.3°F
Driest month: May 70mm 2.8ins
Sunniest month: April 6.4hrs
Coldest month: January -3.8°C 25.2°F
Wettest month: August 152mm 6ins
Warmest sea: August 21.1°C 70°F
Map showing location of Otaru (43.18944, 141.00222)

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