St Marys Weather Forecast

    • 20
    • 26

    Shower or two

    • 19
    • 25

    Showers

    • 19
    • 27

    Showers. Possible afternoon storm

    • 17
    • 27

    Showers increasing

    • 18
    • 25

    Showers

    • 18
    • 25

    Shower or two

    • 18
    • 27

    Shower or two

Today 18 Mar Sydney

Cloudy. High chance of showers. The chance of a thunderstorm in the morning, possibly severe with heavy rain which may lead to flash flooding. Winds southerly 15 to 20 km/h tending southeasterly in the middle of the day then becoming light in the evening.

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  • Temperature Forecast Bureau of Meteorology

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St Marys Temperature Statistics View More

March Temperature

Penrith Lakes (10km)

  • Lowest 15 March, 2026

    13.6 °C

  • Average March

    22.7 °C

  • Highest 11 March, 2026

    34 °C

Climate (2021–Present)

Penrith Lakes (10km)

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  • Average Low 2021–2026

    12.5 °C

  • Average 2021–2026

    17.8 °C

  • Average High 2021–2026

    24.8 °C
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