Blacktown Weather Forecast

    • 18
    • 23

    Showers increasing

    • 17
    • 23

    Showers. Possible afternoon storm

    • 16
    • 31

    Showers. Storm developing

    • 17
    • 35

    Mostly sunny

    • 17
    • 25

    Possible shower

    • 16
    • 23

    Cloudy

    • 14
    • 30

    Partly cloudy

Today 11 Dec Sydney

Cloudy. Very high chance of showers, most likely in the afternoon and evening. The chance of a thunderstorm in the afternoon and evening, possibly severe with heavy rain which may lead to flash flooding. Winds south to southeasterly 25 to 35 km/h.

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Blacktown Temperature Statistics View More

December Temperature

Horsley Park (10km)

  • Lowest 3 December, 2025

    9.6 °C

  • Average December

    22.4 °C

  • Highest 6 December, 2025

    40.8 °C

Climate (2020–Present)

Horsley Park (10km)

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  • Average Low 2020–2025

    12.2 °C

  • Average 2020–2025

    17.2 °C

  • Average High 2020–2025

    23.6 °C
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