Ultimo Weather Forecast

    • 20
    • 31

    Partly cloudy

    • 19
    • 30

    Sunny

    • 19
    • 23

    Shower or two

    • 16
    • 22

    Cloudy

    • 16
    • 25

    Partly cloudy

    • 16
    • 25

    Partly cloudy

    • 17
    • 27

    Partly cloudy

Today 23 Dec Sydney

Partly cloudy. Winds southeasterly 25 to 40 km/h decreasing to 15 to 25 km/h in the evening then becoming east to southeasterly and light in the late evening.

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  • Temperature Forecast Bureau of Meteorology

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Ultimo Temperature Statistics View More

December Temperature

Sydney (Observatory Hill) (2km)

  • Lowest 2 December, 2025

    13.3 °C

  • Average December

    23.1 °C

  • Highest 19 December, 2025

    42.2 °C

Climate (2020–Present)

Sydney (Observatory Hill) (2km)

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  • Average Low 2020–2025

    14.7 °C

  • Average 2020–2025

    18.3 °C

  • Average High 2020–2025

    23.5 °C
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