Mount Isa monthly weather averages

  • Average daytime temperature

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

    Mount Isa average temperature chart
    Average monthly temperatures in Mount Isa (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 35.9 34.9 33.5 30.8 26.8 23.7 23.4 26 29.6 33.5 35.7 36.7
    °F 96.7 94.7 92.2 87.5 80.2 74.6 74.2 78.8 85.3 92.3 96.3 98

    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.

    Average monthly rainfall in Mount Isa (mm and inches)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    mm 97 91 58 17 18 10 12 7 13 21 33 60
    inches 3.8 3.6 2.3 0.7 0.7 0.4 0.5 0.3 0.5 0.8 1.3 2.4
    Rainy days 10 9 7 3 2 2 2 2 2 4 4 7
  • Average daily sunshine

    The bar chart below shows the average daily sunshine hours in Mount Isa

    Average daily sunshine Mount Isa
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Hrs sunshine 9.5 9.2 9.2 10 9.9 10 10.3 10.8 10.6 10.5 10.4 10.1
  • Day / night temperatures

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

    Maximum and minimum daily temperatures in Mount Isa (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Min °C 23.4 22.9 21.3 17.9 13.5 9.4 8 9.8 13.6 17.9 20.9 22.4
    Max °C 36.3 35.2 33.8 31.2 27.1 24 23.8 26.4 30 33.9 36.1 37
    Min °F 74 73.1 70.3 64.1 56.3 48.9 46.4 49.6 56.5 64.2 69.6 72.3
    Max °F 85.6 84.2 81.5 76.1 68.5 62.1 60.6 64.6 71.2 78.6 83.3 85.5
  • Sea temperature

    The graph below shows the average sea temperature.

    Average sea temperature around Mount Isa in degrees centigrade and fahrenheit
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 28.8 28.9 28.5 27.5 25.1 22.4 20.8 21 22.9 25.3 27.2 28.3
    °F 83.8 83.9 83.4 81.4 77.2 72.4 69.4 69.8 73.2 77.6 80.9 82.9
  • Wind speed

    The graph below shows the average wind speed.

    Average wind speed in Mount Isa (mph and kmh)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    km/h 13 12 13 13 13 12 12 13 14 14 13 12
    mph 8 7 8 8 8 7 7 8 9 9 8 8

    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.

    Average relative humidity in Mount Isa
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    41% 45% 40% 35% 40% 40% 37% 30% 25% 24% 26% 31%

Other monthly averages

Mount Isa weather stats

Mount Isa weather statistics
Hottest month: January 35.9°C 96.6°F
Driest month: August 7mm 0.3ins
Sunniest month: August 10.8hrs
Coldest month: July 23.4°C 74.1°F
Wettest month: January 97mm 3.8ins
Warmest sea: February 28.9°C 84°F
Map showing location of Mount Isa (-20.72523, 139.49727)

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