St Marys Weather Forecast

    • 4
    • 21

    Partly cloudy

    • 11
    • 23

    Shower or two

    • 9
    • 14

    Showers

    • 3
    • 14

    Partly cloudy

    • 3
    • 16

    Mostly sunny

    • 5
    • 19

    Mostly sunny

    • 9
    • 21

    Shower or two

Today 24 Sep East Coast

Partly cloudy. Slight chance of a shower later tonight. Light winds becoming northwest to northeasterly 15 to 20 km/h in the middle of the day then becoming northwesterly 15 to 25 km/h in the late afternoon. Daytime maximum temperatures between 18 and 22.

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St Marys Temperature Statistics View More

September Temperature

St Helens Aerodrome (28km)

  • Lowest 22 September, 2026

    1.7 °C

  • Average September

    12.1 °C

  • Highest 20 September, 2026

    23.6 °C

Climate (2021–2026)

St Helens Aerodrome (28km)

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  • Average Low 2021–2026

    9.4 °C

  • Average 2021–2026

    13.4 °C

  • Average High 2021–2026

    18.4 °C
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