Cornwallis Weather Forecast

    • 26
    • 35

    Shower or two

    • 20
    • 35

    Partly cloudy

    • 18
    • 35

    Cloud clearing

    • 18
    • 27

    Shower or two

    • 16
    • 25

    Partly cloudy

    • 13
    • 26

    Partly cloudy

    • 13
    • 28

    Sunny

Today 22 Dec Sydney

Partly cloudy. Medium chance of showers. The chance of a thunderstorm during the morning and early afternoon. Light winds becoming southeast to southwesterly 15 to 20 km/h in the middle of the day then tending east to southeasterly 20 to 30 km/h in the early afternoon.

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Cornwallis Temperature Statistics View More

December Temperature

Richmond RAAF Base (3km)

  • Lowest 2 December, 2025

    9.6 °C

  • Average December

    23.5 °C

  • Highest 19 December, 2025

    42 °C

Climate (2020–Present)

Richmond RAAF Base (3km)

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  • Average Low 2020–2025

    11.6 °C

  • Average 2020–2025

    17.4 °C

  • Average High 2020–2025

    24.5 °C
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