Mount Vernon Weather Forecast

    • 14
    • 27

    Possible shower developing

    • 17
    • 23

    Cloudy

    • 14
    • 25

    Partly cloudy

    • 16
    • 30

    Possible storm

    • 18
    • 33

    Shower or two. Possible storm

    • 19
    • 31

    Shower or two

    • 19
    • 30

    Partly cloudy

Today 31 Dec Sydney

Partly cloudy. Slight chance of a shower in the afternoon and evening. The chance of a thunderstorm in the afternoon and early evening. Light winds becoming southeasterly 15 to 25 km/h in the middle of the day.

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Mount Vernon Temperature Statistics View More

December Temperature

Horsley Park (4km)

  • Lowest 3 December, 2025

    9.6 °C

  • Average December

    21.9 °C

  • Highest 19 December, 2025

    41 °C

Climate (2020–Present)

Horsley Park (4km)

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  • Average Low 2020–2025

    12.2 °C

  • Average 2020–2025

    17.3 °C

  • Average High 2020–2025

    23.7 °C
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