Lake Illawarra monthly weather averages

Average daytime temperature

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

Lake Illawarra average temperature chart (Celsius) Lake Illawarra average temperature chart (Fahrenheit)
Average monthly temperatures in Lake Illawarra (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 25.4 25.4 24.3 21.9 18.6 16 15.5 16.5 18.9 21.1 22.6 24.8
°F 77.7 77.7 75.8 71.4 65.5 60.9 59.8 61.7 66 69.9 72.8 76.6

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.

Lake Illawarra monthly rainfall chart (mm) Lake Illawarra monthly rainfall chart (inches)
Average monthly rainfall in Lake Illawarra (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 136 163 177 132 112 144 66 92 65 115 116 98
inches 5.4 6.4 7 5.2 4.4 5.7 2.6 3.6 2.6 4.5 4.6 3.9
Rainy days 13 12 13 11 11 11 8 10 10 13 13 11

Average annual rainfall in Lake Illawarra: 1532.15mm (603.2 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Lake Illawarra

Lake Illawarra average daily sunshine chart
Average daily sunshine Lake Illawarra
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 7.4 7.2 6.8 6.8 6.2 6.1 7 7.6 7.7 7.7 8 8.1

Day / night temperatures

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

Lake Illawarra average minimum / maximum temperatures (Celsius) Lake Illawarra average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Lake Illawarra (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 16.2 16.6 15 11.9 9 6.8 5.1 6.3 8.2 10.9 12.8 14.9
Max °C 25.6 25.6 24.5 22.1 18.8 16.3 15.7 16.8 19.1 21.3 22.9 25
Min °F 61.1 61.8 58.9 53.4 48.1 44.3 41.2 43.3 46.7 51.6 55 58.8
Max °F 69.6 70 67.6 62.6 57 52.8 50.8 52.7 56.6 61 64.1 67.9

Sea temperature

The graph below shows the average sea temperature.

Lake Illawarra average sea temperature chart (Celsius) Lake Illawarra average sea temperature chart (Fahrenheit)
Average sea temperature around Lake Illawarra in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 22.9 23.4 23.1 22.3 20.7 19.2 18 17.8 18.1 18.7 19.8 21.4
°F 73.2 74.1 73.6 72.1 69.3 66.5 64.4 64.1 64.6 65.7 67.6 70.5

Wind speed

The graph below shows the average wind speed.

Lake Illawarra average winspeed by month (km/h) Lake Illawarra average winspeed by month (mph)
Average wind speed in Lake Illawarra (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 16 14 13 13 12 13 14 15 16 17 17 16
mph 10 9 8 8 8 8 8 9 10 10 10 10

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.

Lake Illawarra relative humidity averages
Average relative humidity in Lake Illawarra
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
65% 67% 66% 65% 66% 67% 61% 59% 56% 57% 60% 60%

Other monthly averages

UV index Best time to go?

Lake Illawarra weather stats

Lake Illawarra weather statistics
Hottest month: February 25.4°C 77.7°F
Driest month: September 65mm 2.6ins
Sunniest month: August 7.6hrs
Coldest month: July 15.5°C 59.9°F
Wettest month: March 177mm 7ins
Warmest sea: February 23.4°C 74.1°F
Map showing location of Lake Illawarra (-34.54658, 150.85645) Lake Illawarra map pin © Google

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