St Marys South Weather Forecast

    • 15
    • 35

    Possible shower or storm

    • 14
    • 19

    Showers

    • 11
    • 20

    Cloudy

    • 9
    • 25

    Mostly sunny

    • 9
    • 30

    Sunny

    • 13
    • 33

    Sunny

    • 16
    • 33

    Shower or two

Today 26 Sep Sydney

Partly cloudy. Slight chance of a shower in the late afternoon and evening. The chance of a thunderstorm in the afternoon and evening. Winds northwest to southwesterly 15 to 20 km/h tending southeast to southwesterly 15 to 25 km/h in the late afternoon then tending southerly 25 to 35 km/h in the evening.

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St Marys South Temperature Statistics View More

September Temperature

Horsley Park (11km)

  • Lowest 18 September, 2026

    5.2 °C

  • Average September

    16.6 °C

  • Highest 20 September, 2026

    33.3 °C

Climate (2021–2026)

Horsley Park (11km)

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  • Average Low 2021–2026

    12.5 °C

  • Average 2021–2026

    17.4 °C

  • Average High 2021–2026

    23.8 °C
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