St Marys South Weather Forecast

    • 15
    • 28

    Mostly sunny

    • 16
    • 26

    Possible shower

    • 16
    • 25

    Cloudy

    • 16
    • 32

    Partly cloudy

    • 19
    • 39

    Mostly sunny

    • 22
    • 33

    Mostly sunny

    • 19
    • 34

    Partly cloudy

Today 21 Jan Sydney

Mostly sunny. Slight chance of a shower along the coastal fringe, near zero chance elsewhere. Light winds becoming easterly 15 to 20 km/h in the early afternoon then becoming light in the evening.

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St Marys South Temperature Statistics View More

January Temperature

Horsley Park (11km)

  • Lowest 1 January, 2026

    15.4 °C

  • Average January

    22.4 °C

  • Highest 10 January, 2026

    41.5 °C

Climate (2021–Present)

Horsley Park (11km)

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  • Average Low 2021–2026

    12.2 °C

  • Average 2021–2026

    17.3 °C

  • Average High 2021–2026

    23.7 °C
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