Perth monthly weather averages

Average daytime temperature

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

Perth average temperature chart (Celsius) Perth average temperature chart (Fahrenheit)
Average monthly temperatures in Perth (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 30.7 30.9 28.7 24.4 20.9 18.4 17.4 17.8 19.5 21.8 24.9 28
°F 87.2 87.7 83.7 76 69.6 65.2 63.3 64 67.1 71.3 76.8 82.4

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.

Perth monthly rainfall chart (mm) Perth monthly rainfall chart (inches)
Average monthly rainfall in Perth (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 8 18 15 45 112 177 169 118 71 52 25 13
inches 0.3 0.7 0.6 1.8 4.4 7 6.7 4.6 2.8 2.1 1 0.5
Rainy days 3 6 6 9 12 14 15 13 10 9 4 4

Average daily sunshine

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

Perth average daily sunshine chart
Average daily sunshine Perth
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 12 11 9.4 7.4 6.2 5.5 5.8 7 8 9 10.2 11.6

Day / night temperatures

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

Perth average minimum / maximum temperatures (Celsius) Perth average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Perth (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 17.6 18.2 16.6 13.7 11.1 9.8 8.6 8.6 9.7 11.1 13.5 15.7
Max °C 31 31.3 29 24.7 21.2 18.7 17.6 18 19.8 22.1 25.2 28.3
Min °F 63.7 64.7 61.9 56.7 51.9 49.6 47.5 47.5 49.4 52 56.2 60.3
Max °F 75.7 76.5 73 66.6 61 57.6 55.6 55.9 58.5 61.9 66.7 71.6

Sea temperature

The graph below shows the average sea temperature.

Perth average sea temperature chart (Celsius) Perth average sea temperature chart (Fahrenheit)
Average sea temperature around Perth in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 21.7 22.4 22.7 22.5 22 21.2 20.1 19.3 19.1 19.2 19.8 20.8
°F 71 72.2 72.8 72.5 71.6 70.1 68.2 66.8 66.3 66.5 67.7 69.4

Wind speed

The graph below shows the average wind speed.

Perth average winspeed by month (km/h) Perth average winspeed by month (mph)
Average wind speed in Perth (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 20 19 18 16 16 17 17 16 17 18 19 19
mph 12 12 11 10 10 10 10 10 10 11 12 12

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.

Perth relative humidity averages
Average relative humidity in Perth
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
41% 43% 46% 55% 62% 70% 71% 67% 62% 54% 48% 44%
Perth

Other monthly averages

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Perth weather stats

Perth weather statistics
Hottest month: February 30.9°C 87.6°F
Driest month: January 8mm 0.3ins
Sunniest month: January 12hrs
Coldest month: July 17.4°C 63.3°F
Wettest month: June 177mm 7ins
Warmest sea: March 22.7°C 72.9°F
Map showing location of Perth (-31.95224, 115.8614)

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