Hawkesbury River - Swallow Rock Reach Weather Forecast

    • 21
    • 41

    Possible shower or storm

    • 26
    • 36

    Shower or two

    • 19
    • 35

    Mostly sunny

    • 18
    • 35

    Partly cloudy

    • 18
    • 27

    Possible shower

    • 15
    • 25

    Partly cloudy

    • 13
    • 28

    Mostly sunny

Today 21 Dec Sydney

Partly cloudy. Medium chance of showers, most likely in the evening. The chance of a thunderstorm in the afternoon and early evening. Winds northwest to northeasterly 15 to 25 km/h tending southeast to southwesterly 15 to 20 km/h in the evening then becoming light in the late evening.

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  • Temperature Forecast Bureau of Meteorology

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Hawkesbury River - Swallow Rock Reach Temperature Statistics View More

December Temperature

Richmond RAAF Base (13km)

  • Lowest 2 December, 2025

    9.6 °C

  • Average December

    23.2 °C

  • Highest 19 December, 2025

    42 °C

Climate (2020–Present)

Richmond RAAF Base (13km)

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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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