St Marys South Weather Forecast

    • 15
    • 30

    Shower or two. Possible storm

    • 18
    • 29

    Showers. Possible afternoon storm

    • 17
    • 28

    Shower or two

    • 17
    • 28

    Showers. Storm developing

    • 16
    • 31

    Partly cloudy

    • 15
    • 26

    Partly cloudy

    • 12
    • 29

    Sunny

Today 31 Oct Sydney

Partly cloudy. High chance of showers, becoming less likely later tonight. The chance of a thunderstorm. Winds northerly 20 to 30 km/h decreasing to 15 to 20 km/h in the evening.

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St Marys South Temperature Statistics View More

October Temperature

Horsley Park (11 km)

  • Lowest 9 October, 2026

    7.8 °C

  • Average October

    18.3 °C

  • Highest 12 October, 2026

    34.9 °C

Climate (2021–2026)

Horsley Park (11 km)

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  • Average Low 2021–2026

    12.5 °C

  • Average 2021–2026

    17.5 °C

  • Average High 2021–2026

    23.9 °C
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